Weeks of july. Lets get more on the latest on all of this with cnn National Correspondent athena jones. Athena, there is some breaking news out of georgia right now. Isnt that right . Reporter hi, jim. Thats right. This is what happens when you try to open schools in a community where you havent brought the Coronavirus Infection rate way down. Were looking at Cherokee County schools in georgia. At least 484 students and 21 Staff Members have been quarantined because that district is reporting some 25 positive cases among students and staff. And its not just there. We are seeing this in other schools that have also opened in the state. If we just act like the virus isnt there and we kind of go for it and try to tough it out, it wont work. Reporter Public Health experts warned this would happen, and now it has. Schools in states with high rates of covid19 infections opening up too quickly without the proper precautions and suffering the consequences as new cases pile up. The Georgia High School made famous in this viral photo now temporarily closed after nine students and employees tested positive. The school, where masks are not required, Holding Classes remotely while it undergoes a deep cleaning. At least 16 schools in Cherokee County, georgia, have reported cases in students or staff. The reason all this is happening is because we havent controlled the virus spread in the community. Reporter the lack of a mask mandate in most georgia schools and concerns about crowd causing fear. From teachers, students, parents, Staff Members at school, all with really the same message that schools in georgia are not prepared to go back to facetoface instruction right now. Reporter georgia governor brian kemp, who opposes a statewide mask mandate, today announcing the launch of a temporary site that will be able to test 5,000 people a day promising results in 48 to 72 hours. We have come a long way. But we are not out of the woods yet. And we cannot take our foot off the gas. Reporter the trouble with schools coming as the American Academy of pediatrics and the Childrens Hospital association say nearly 100,000 children in the u. S. Tested positive for covid in just the last two weeks of july. With covid Positivity Rates rising in dozens of states, there are new concerns about states like idaho, indiana, and illinois where chicagos mayor tweeted this image of a crowded beach. People need to recognize that this covid19 pandemic is still going on. It has not gone anywhere. And people need to take it very seriously. Reporter average daily deaths nationwide have topped a thousand for the past two weeks. And record states are seeing record hospitalizations. In texas, now the third state to top half a million cases, the Positivity Rate is over 20 , a new record. Even as the states testing rapt has fallen. Meanwhile, College Football is hanging in the balance. Multiple sports outlets reporting leaders of the power 5 sports conferences are in discussions about postponing the season due to covid concerns, a move the midamerican conference announced over the weekend. This was a crushing decision to be made by our membership. It was not a decision that was made lightly. It was not a decision that was made quickly. And it was a decision that was made based on the advice of our medical experts. Reporter and there is news on the vaccine front. Pharmaceutical Company Moderna reporting that its been able to recruit fewer than 5,000 volunteers out of the 30,000 it hopes to take part in its vaccine trial, leading experts to say there is absolutely no way the Moderna Vaccine can be ready by election day, as President Trump has predicted. Athena jones, thank you very much. President trump is defending the executive orders he issued on pandemic relief, even as the white house is struggling to explain them. Theyre having trouble laying it out for the american people. Yeah, thats right, jim. The president also spinning these executive actions, claiming that they do more to help struggling americans than they actually do. The president dodging criticism even from within his own party that these actions are unconstitutional and also ignoring previous statements that hes made about executive actions. Tonight, President Trump sparring with his own party, taking aim at critics of his new executive actions, tweeting that nebraska senator ben sasse is a republican in name only, saying he has, quote, gone rogue again. This foolishness plays right into the hands of the radical left dems. Sasse tearing into trumps decision to circumvent stimulus negotiations in congress, calling the move unconstitutional slop, comparing the actions to president obamas signing of executive orders after lawmakers could not reach consensus, orders that trump himself frequently criticized. The country wasnt based on executive orders. Right now obama goes around signing executive orders. Its a disaster. You cant do it. In theory, the oldfashioned way, get everybody into a room and get something the people agree on. Reporter trump was not in the room getting lawmakers together, instead spending the weekend at his golf club in new jersey as questions linger over whether the actions will survive legal challenges, members of the administration struggled to even explain them. You keep saying 1,200 per person. Are you talking about in addition to the unemployment that theyre already getting . Oh, no. Thats the payroll so i beg your pardon. The 1,200 will come from the payroll tax. It should be 800 bucks. I beg your pardon. It should be 800 bucks for the unemployment. 800 or 400 . No. It should be 800. Reporter but white house chief of staff mark meadows appears more concerned with Public Comments from the administrations Health Experts. The Washington Post reporting meadows has admonished dr. Anthony fauci for sounding out of sync with trump, according to the post, meadows has also excluded Health Experts from morning meetings with staff, privately sharing skepticism about dr. Fauci and dr. Deborah birx, questioning their expertise and regularly raising issues on what she thinks theyve been wrong. A source familiar telling cnn aides are mulling a symbolic executive action for trump to sign on voting laws. Critics charging trump as trying to sink mailin voting to boost his chances in november. Trumps handpicked post master general firing or reassigning some two dozen top officials at the cashstrapped agency on friday night. Trump also trying to discredit New York Times reporting that white house aides inquired about adding his face to mount rush more, though he denies it, south dakotas governor confirmed his ambition back in 2018. You should come to south dakota sometime, we have Mount Rushmore. He said do you know its my dream to have my face on Mount Rushmore . And i started laughing, and he wasnt laughing so he was totally serious. Reporter trump later showing a photo of himself next to the monument adding that the addition sounds like a good idea. Trump today also announcing that he has narrowed down his choices for a location to deliver his rnc acceptance speech to two places, either here at the white house which republicans and even members of his own staff have already criticized or gettysburg, pennsylvania, the site of one of the deadliest battles of the civil war. Jim . And one the confederacy lost. Lets get more on all of this with cnn chief medical correspondent dr. Sanjay gupta. Sanjay, the world is on the verge of passing 20 million confirmed coronavirus cases, just a staggering total. But a quarter of those cases, as weve all been talking about, right here in the United States. 5 million cases when this pandemic started several months ago. Did you ever think we would end up in this situation here in the u. S. . Uh, no, jim. I never imagined that we would have a quarter of the worlds infections in this country. I mean, i knew there was a contagious virus that was likely to spread the but the fact that weve been hit so disproportionately hard in this country, i did not expect that. Were an affluent country. We have lots of resources. But this speaks to just i think how many mistakes candidly have been made along the way. Jim, i think the thing is now youve got to keep in mind that when we decided to go in some sort of shutdown mode back in the middle of march, there were fewer than 5,000 people who had been infected and fewer than 500 people who had died. Now were in the middle of august. You see the numbers on the screen. 5 million infections. 163,000 people have died. And had were thinking about opening back up. Despite the fact that we havent created the infrastructure or anything to do so. So we shut down it would be like we got out of the water as it was getting slightly warm and now were diving back in when its boiling. That concerns me as well because i think its just going to amplify the problem that youre raising. You just spoke with the fda commissioner stephen hahn about the hunt for a Coronavirus Vaccine. He insisted the fda would not, quote, cut corners on vaccine safety. Thats an Important Message for a lot of americans out there, because i suppose because of the president and others saying they want to have a Coronavirus Vaccine as quickly as possible. Americans may not have confidence in the vetting process. What did you take away from your conversation with dr. Hahn . Well, first, thanks for having me with you this afternoon. And dr. Hahn reassured us repeatedly that science and evidencebased research would be at the root of all of their decisions, and we certainly thats music to our ears. We think that the science must be adhered to. We cant cut corners. We cant do anything that would jeopardize the safety of the american people, and the vaccines got to be effective for it to work. We did hear a lot of other great things about upcoming therapeutics and studies to treat the covid19 as well as news about this coming flu season. And President Trump, as you know, dr. Bailey, has floated the idea that the Moderna Vaccine could be approved by election day, which obviously raises concerns that this process is being politicized. You just spoke to that to some extent. Most experts believe this time line is unlikely. What does it say to you when he says we are not going to cut corners . I suppose one of the reasons why youre so concerned about this is because you cant have a vaccine come out with any questions being raised about it. Or else you could have huge swaths of this country just not trusting it. I think its important to understand the vaccine study process. Theyre trying to get 30,000 volunteers through the Coronavirus Prevention Network dot org. So far modernas gotten about 5,000. It takes time to recruit people to enter these studies. With the vaccines after they get the first dose, they have to get another booster several weeks later. And then you have to see if they catch covid19 in their communities. That just takes time to do. And if you dont have adequate data comparing the Placebo Group with the group that got vaccine, youre not going to be able to tell whether the vaccine works or not. Its just that simple. And these things take time. And, sanjay, the u. S. Reported nearly 100,000 confirmed cases in children in just the last two weeks of july. What does that amoemean for the prospect of opening schools . Yeah. No doubt. Were grappling with it, im sure you are as well. I think this is concerning though. We know that kids are becoming infected and theyre becoming infected at an increasing rate. I think part of the reason that the numbers i will say that its less likely for kids to get sick. I think that that has held up since even some of the early data that we saw out of wuhan. Its a separate issue from the idea that they can transmit the virus, they can be spreaders. I think that we just havent known enough about little kids because little kids in particular have been largely home since the middle of march. They havent had many contacts. Theres this Contact Tracing out of south korea that everyone is citing, looked at the study very closely. They followed some 50,000 contacts from people of all these different age groups. But for kids under the age of 9, there was only 50 or 60 contacts that were followed total. The point is we dont know. We know these little kids carry a lot of virus in their noses and we know like with flu they can spread viruses. Its, i think, a concern no doubt, jim, as kids go back to school that these numbers will increase significantly. Okay. And its something were all thinking about right now as we speak. Dr. Sanjay gupta, dr. Susan bailey, thanks for breaking this down for us. And up next President Trump faces pushback over his executive orders on pandemic relief. He now says he may give his republican nomination acceptance speech at gettysburg. Well talk about it with our political experts. Got to hand it to you, jamie. Your knowledge of victorian architecture really paid off this time. Nah, just got lucky. So did the thompsons. That faulty wiring couldve cost them a lot more than the mudroom. Thankfully they bundled their motorcycle with their home and auto. Theyre protected 24 7. Mm. What do you say . One more game of backgammon . [ chuckles ] not on your life. [ laughs ] when the lights go down book two separate qualifying stays and earn a free night. The open road is open again. And wherever youre headed, Choice Hotels is there. Book direct at choicehotels. Com. 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You both have read the executive action. Its very unclear, and it certainly didnt match what the president actually said that it was going to do when he gave his address at his golf club on saturday. So, i think the answer to your question is were not going to have clarity. Nobodys going to have clarity until its done the right way, until its done legislatively with a compromise, with the democrats and the republicans and its passed through the house and senate and signed by the president as the first c. A. R. E. S. Act, the original relief bill was done and the several pieces of legislation done afterwards. Because this is not the kind of thing that is meant for executive action. You note this, jim, and i think you reported this that a big part of why the president did this was to try to boost the democrats to getting them to the table, and more importantly, to getting them to try to give a little bit more negotiations. Im not sure it had that effect. But well see. Absolutely. And, gloria, candidate donald trump as we all know, we saw this during the 2016 campaign. Other republicans working for the president frequently criticized president obama and his executive orders on daca and everything else. Now President Trump has taken a liking to them. What do you make of this hypocrisy . I suppose all candidates like to talk about executive orders until they get into the white house. Well, even by washington standards, its pretty hypocritical. I remember covering republicans and im sure you guys do, covering republicans, talking about obama and the socalled imperial presidency. And they talked about this nonstop and they talked about it with regard to immigration you point out with dreamers. And now suddenly you have some republicans at least. A lot of republicans have said i dont like this. But mostly privately. Sitting back and saying, okay, let the president do this because they understand, as we all do, that this is just for show. They know this isnt going to happen, as dana was pointing out. They know it has to be done the right way. But if theres any political mileage they can get out of it this close to an election, i guess theyre ready to take it. Now, an exception to that is ben sasse who called it unconstitutional slop, i believe. But, you know, republicans, as they have during much of this administration, are sometimes willing to sit back and say, okay, let this play out and lets see if it works for me. And, dana, you had quite the moment with the president s top economic adviser larry kudlow yesterday on state of the union. And it seems like he doesnt even understand exactly how this executive order is going to work, which i suppose he shares that with a lot of other americans around the country. Lets watch. So when will people see their first checks . I dont want to be as specific as you might hold me to it, as you should, but i think its going to be in a couple of weeks, and i think its going to come to about 1,200 per person. Thats a huge you keep saying 1,200 per person. Are you talking about in addition to the unemployment that theyre already getting . Oh, no. Where does that number come from . I beg your pardon. The 1,200 will come from the payroll tax deferral. Okay. Were going to get to that because theres a lot of numbers here and its a little confusing. I want to get to payroll tax in a minute. It should be 800 bucks for the unemployment. 800 or 400 . No. It should be 4 it should be 800. If the states step up, were prepared to match, that should come out 400 federal, 400 states. Dana, i feel like im playing monopoly and i dont know if im supposed to get 600 when i land on park place or 800. But if the president s own chief economic adviser cant make sense of this, how are the rest of us supposed to do it . Its very hard. And, you know, look, this was obviously put together extremely quickly without very much to back it up. I think the most egregious part of what was in the executive order, executive action, was that 400 that the president claimed would be coming from, given back to people. Remember the 600, enhanced Unemployment Benefits ran out at the end of july. He was saying they would get 400 again. But if you look at it, number one, it requires the states to ask the federal government for the money. And number two, it requires the states to give a quarter of that, so 100. And most importantly even larry kudlow admitted to me that they havent really reached out to most of the states. He wasnt sure even if states were going to participate. Later on in the program i talked to mike dewine, so it was done extremely quickly and back to what we were talking about at the beginning of this segment, much more of a political ploy than a real attempt, it seems, to get people the help that they want. Yeah, gloria, that executive order doesnt add up. The payroll tax executive order the president put out, a lot of employers are saying that they may not even participate in that because you are just deferring the payroll tax cut here as opposed to absolving people from having to pay it. Does any of this make sense to you . No. I think its for show. I think its purely political. When donald trump stood up there and said im signing this, he even acknowledged that it was going to wind up in court. And i think what he was using it as a way, as dana pointed out earlier, thinking that, well, ill get democrats back to the table. He said the democrats are calling me when in fact we learned that theyre not. I think at some point they all ought to get back to the table. But this was a ploy that was not very well thought out. And if youre sitting out there and youre getting your 600 in unemployment insurance, you are wondering, well, has it just been cut in half . What am i going to do about it . And i dont think this provides any answers to those people. All right. Well, thanks for breaking it down for us. Well stay on top of it. And well see what the president has to say when he comes out in this briefing in just a short while. Dana and gloria, thank you so much. Coming up, the Massachusetts Governor orders new restrictions as cases in that state climb. Ill talk about it with the mayor of boston. Plus, Important Information about what kind of mask you should be wearing. Well get details of a study showing which work best and some that dont work at all. This is our moment to build a new American Economy for our families and for our communities. When we spend taxpayers money, we should use it to buy American Products and support american jobs. Its time to help Small Businesses who will purchase Clean Energy Technologies to fight Climate Change and enhance national security. We have to invest in what the jobs and industries of tomorrow are going to be. We have a great opportunity, build back and build back better. Im joe biden and i approve this message. When their growing family meant growing expenses, our agents helped make saving on insurance easy usaa. What youre made of, were made for. Usaa its more than just fast. It keeps all your devices running smoothly. With builtin security that protects your kids. Protects your info and gives you 24 7 peace of mind that if its connected, its protected. Even that that petcamera thingy. Can your internet do that . Xfinity xfi can because its simple, easy, awesome. Get advanced security free with the xfi gateway. Download the xfi app today. Coronavirus testing is decreasing in texas, but the state is seeing a record high Positivity Rate. Cnns ed lavandera is in plano for us. Ed, these are some very troubling news in that state. Reporter it is, jim. Think back to the end of may, the positive infection rate of new coronavirus cases in the state was at just over 4 . Today as were awaiting the latest numbers to come out, they havent yet come out this afternoon, we stand at just over 20 . So thats five times higher than we were less than three months ago. Staggering increase in infection spread of this virus. And as top Health Experts across the country will tell you, this is one of the key indicators that they look at in terms of modeling and trying to figure out whats going to come next. But this also comes, jim, at a time when the number of overall tests being reported here in this state has dropped dramatically. A couple weeks ago the state of texas was reporting about 70,000 tests being done per day. That number now is hovering around 45,000 tests per day. We dont quite know exactly what is going on there. Weve reached out to Health Officials here in texas but have not heard back today. Is this a question of fewer people wanting to get tested, or is it the fact that some tests are just taking way too long to come back so people are giving up on them . The exact cause of this, we dont know at this point. But overall other disturbing news emerging today, the university of texas with a study suggesting that the death toll in the state which now stands at just over 8,500, could top 23,000 by the end of this month. The university of washington model which has been depended on quite a bit across the country is projecting about 27,000 deaths by the end of this year. Of course, these are just projections. They can change from week to week, month to month. But it really does give you a sense that right now Health Experts are very worried about the death toll that is going to mount here in the state as the virus continues to spread, jim. It is a very worrying trend. All right, cnns ed lavandera, thank you very much for that. Lets get an update now on a new concern about boston. Mayor marty walsh joins us. Mayor, thanks for joining us. Dr. Deborah birx says boston is on her list of cities seeing a concerning rise in coronavirus cases. How are you responding to that warning . Were seeing incremental numbers going up. Last week well, the week before last. So were watching this very closely. Its kind of the first time that were seeing increased backtoback weeks. What were doing here is going to continue to remind people about the physical distancing, the social distancing, the maskwearing. Were trying to do Contract Tracing just to make sure that were not seeing spikes in certain places around restaurants and parks and things like that. Our governor rolled back 100person gathering to 50people gathering. He did not move to the next phase, which meant more people in restaurants. We were hit very hard in the beginning, both boston and the commonwealth of massachusetts. And you dont want to go in reverse. And the governor there, charlie baker, announced tomorrow he is restricting Gathering Sizes and stepping up enforcement of bars masquerading as restaurants. Do you think these additional restrictions will be necessary if cases keep rising . And what more can be done . I hope they have to work. I think that people understand that if they dont work were going to be rolling back even more. And thats something we dont want to go backwards. We have a very busy six or seven weeks in front of us. I would love to see schools opening in boston. Obviously were looking at it now. But thats only a potential it. Might not happen. If the numbers continue to rise, we want to make sure that the restaurants and our Service Industry survives. They took a big hit for the months of march, april, may, june and they dont want to see it roll back. And i keep reminding people to look at whats happening around the country in seeing those numbers go high, particularly in gatherings where people arent Wearing Masks that that very much could be boston, massachusetts, again, if we dont continue to be very careful moving forward. And you mentioned schools. We understand youre planning sort of a hybrid School Reopening at this point, at least looking at that which would give the option of fulltime Remote Learning but allow some children to return to classrooms on a parttime basis. Im sure you have seen this, mayor, that there are some experts who argue that this hybrid model may be more dangerous because children will be exposed to more of their peers outside the classroom and then potentially infect people, a new set of peers when theyre inside the classroom, sort of moving back and forth from inperson learning to Remote Learning. Why did boston opt for this model . Why are you looking at it . Id love to come back to school. Our kids by the beginning of september, september 10th or 11th around that time, our kids will be six months out of a school building. Im concerned about their educational future, quite honestly, by losing all that time. We did have Online Learning but its not the same as inclassroom learning that cant be repeated. We are trying to close achievement gaps here the city of boston. We are trying to make sure our young people of color dont see a growing gap here in our educational system. Were going to do our best to be able to try and open school in the hybrid model again. We might not be able to its all going to be based off of science and data. And its all going to be incumbent upon parents to make sure that when their kids are not in school, we still have to make sure that when kids are in school that theyre physical distancing, social distancing, Wearing Masks. That is as important right now as any other time. I know a lot of us feel and wish that we would be around the coronavirus but its very much still here. I know with what the experts have said about schools. But its about being disciplined when people arent in school as well. We know you have a big task ahead of you and wish you good luck in the city of boston. Thank you very much for joining us. Good luck in the fight against the coronavirus. We appreciate it. Thanks, jim. And stay with us. Were waiting for President Trump to take questions from reporters at this evenings white house briefing. And next a look at coronavirus headlines from around the world including new rules about Wearing Masks outside in paris. Will people obey . Thats a big question there in paris. Well take a look. Because its inanimate people ask me what sort of a person should become a celebrity accountant. And, i tell them, nobody should. Hey, buddy. Whats the damage . I bought it the waterfall . Nope a new volkswagen. A volkswagen . I think were having a breakthrough here welcome to caesars palace. Thank you. Im a talking dog. The other issue. Oh. Im scratching like crazy. Youve got some allergic itch with skin inflammation. Apoquel can work on that itch in as little as 4 hours, whether its a new or chronic problem. And apoquels treated over 8 million dogs. Nice. And. The talking dog thing . Is it bothering you . No. Itching like a dog is bothering me. Until dogs can speak for themselves, you have to. When allergic itch is a problem, ask for apoquel. Apoquel is for the control of itch associated with allergic dermatitis and the control of Atopic Dermatitis in dogs. Do not use apoquel in dogs less than 12 months old or those with serious infections. Apoquel may increase the chance of developing serious infections and may cause existing parasitic skin infestations or preexisting cancers to worsen. Do not use in breeding, pregnant, or lactating dogs. Most common side effects are vomiting and diarrhea. Feeling better . Im speechless. Thanks for the apoquel. Aw. Thats what friends are for. Ask your veterinarian for apoquel next to you, apoquel is a dogs best friend. Try wayf r. You got this perfect. Youre welcome. I love it. Howd you do all this . Told ya wayfair. Lets talk dining tables. Yes blow it up. Wayfair youve got just what i need concentration in we suppohectic times. Oments, and focus to win the day. Unlike ordinary memory supplements. Neurivas clinically proven ingredients fuel 5 indicators of brain performance. Take the neuriva challenge with our moneyback guarantee in global coronavirus headlines, british Prime Minister boris johnson, like President Trump, is pushing schools to reopen this fall. Lets go to cnns Nic Robertson in london. Tell us more, nick. Reporter jim, the british Prime Minister visited a school today to reinforce his message he wants children back in school by september. He said its a national priority. Hes indicated that as coronavirus rates are going up here in the uk, if they cross a certain threshold, then its forced to choose between keeping schools open. Unions pushing back. They want the Prime Minister to have a plan b, perhaps teaching in the classroom for a week, teaching at home for a week. Others are saying there should be regular testing for teachers and pupils. The government is saying they are looking at surveys and studies that are being done right now, International Studies and surveys where they say infection rates in classrooms between pupils and between pupils and teachers is relatively low. They want these children back in the classrooms in part as well because the Prime Minister recognizes to get the economy going, and thats a big driver for him, he needs parents to be free to be able to go to work. In the week of a new increase in coronavirus cases, french authorities are getting more strict about maskwearing. What are you seeing . Reporter jim, it is now compulsory to wear face masks in some parts of paris. The river banks and Tourist Spots and streets like this one where it is hard to stay socially distanced. Its quiet now, but this plates gets busy in the evening and its not always possible to be three feet away from people at all times. Masks are compulsory for ages 11 years old and up. And there is a 160 fine if you dont wear one. Police were really trying to remind people of this rule. Authorities tightened these rules because france has seen a marked increase in new coronavirus cases in recent weeks. Jim . Cyril, thank you very much for that. And brazil and mexico rank second and third behind the United States for the number of coronavirus deaths. Cnns matt rivers is monitoring the situation from mexico city. There are grim milestones in both countries, arent there . Reporter well, jim, another difficult weekend here in latin america led by the two countries hit hardest by this outbreak, brazil and mexico. In brazil, the death toll there more than 100,000 and counting. More than 3 million cases and counting. And yet the countrys president , jair bolsonaro, continues to be flippant about the fact that tens of thousands of his fellow countrymen have died. Bolsonaro posted on his Facebook Page a photograph celebrating one of his favorite soccer teams latest victories right after the 100,000 mark was announced. The death toll in mexico has now cleared 50,000 for the first time. Jim . Matt rivers, thank you for that. Were standing by for President Trump to take questions at this evenings white house briefing. And up next new data show which masks work the best when it comes to preventing the spread of the coronavirus. Stay tuned for that. 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Reporter interesting and important findings, jim. Researchers at Duke University say the kinds of masks weve been wearing really run the gamut including one type that does more harm than good. They come in so many different styles, materials, and designs, from n95 surgical masks to bandannas, knitted maskz, even socalled gators, those stretchy bands of fabric that cover the neck. A new study has advice on which masks work and which dont. Gators or fleece masks, they say, you should stay away from. Its a combination, certainly, of stretchiness of the material and the material potentially being very thin. Reporter bandanna, according to the researchers, may look cool but doesnt work well. The material itself that is just made a little bit more transparent and a little bit more transmissive to these droplets. In addition, theres, of course, lots of gaps. Reporter the duke researchers tested 14 different kinds of masks. They shined iridescent light from a laser through slits in a dark box. A person spoke one phrase repeatedly into the box to create droplets. Stay healthy, people. Stay healthy, people. Reporter they used a cell phone camera to record the droplets, then counted the droplets that were let through by the different masks. The ones that worked well, they say, n95 surgical masks are the best, letting out very few if any droplets. But those should be reserved for frontline healthcare workers. Those standard surgical masks, the light blue ones that many of us can buy at stores, also work well, they say, and all the cotton masks weve tested, they work great. Reporter the duke researchers say theres one kind of mask that they believe does more harm than good. The fleece mask, because of the size of droplets it lets through. Whats noticeable here is that you see lots of particles and lots of little particles, so this is actually counterproductive because the little particles, they get generated from big particles. They tend to hang around longer in the air. They can get carried away easier in the air. The duke researchers told cnn their studys not meant as an endorsement of certain masks. Other experts are hopeful that this kind of advice can be communicated more clearly to the public, acknowledgings theres been way too much confusion. We should not have any confusion over mask wearing. This is confusion that we ourselves, the frontline workers, the government, Public Health experts, doctors, nurses and other influential people when it comes to Infection Prevention and control. Breaking news. I want to go to cnns white house correspondent, boris sanchez, who has the breaking news on the situation there. Boris, what do we know right now . Reporter well, jim, it sounds like the white house is on lockdown at this moment. Were getting this from our colleague, jeremy diamond, whos actually on the premises. From what we understand, the president was giving this briefing when suddenly he effectively left the room. The press Briefing Room. I can tell you, we are just outside of Lafayette Park. This is not far from the white house grounds, and there were sounds of sirens outside. We heard shouting. I didnt get actual eyes on Lafayette Park to see what was happening, but as you can see in this video, the president , from one moment to the next, leaving the briefing almost midsentence. Obviously, were still working to get more information on exactly what is happening, but it sounds, it appears as if at this moment, the white house is on lockdown. Again, we heard sirens outside. We heard people shouting. I didnt get eyes on Lafayette Park, but it sounded like there was shouting back and forth, some sort of a scuffle outside, loud sounds, and then the president left the Briefing Room. You could see inside, reporters looking outside of the press Briefing Room. Were working to figure out exactly what is happening right now, but clearly, an unplanned moment here at 1600 pennsylvania avenue, jim. Absolutely. And boris, you and i both know, covering the white house, this happens from time to time, the secret service will place the grounds on lockdown and theyll keep the reporters holed up inside the Briefing Room the way they are right now. That is not totally unusual, but to have the president in the middle of a briefing talking, you know, in a press conference typesetting wi type setting with reporters in the room and secret service to whisk him out that quickly, obviously, that is highly unusual so were trying to get to the bottom of exactly what was going on. Boris, let me ask you, because were seeing some of our colleagues in the White House Press corps outside of the doors to the Briefing Room. It looks as though theyre trying to get, perhaps, people back inside, but maybe there might have been some crews outside for a few moments to figure out whats going on. What can you tell us . Reporter yeah, so, it really comes down to the geography of how things are set up at the white house. As you can imagine, with everything thats happening right now, the president addressing reporters, a lot of our setup, as journalists, is actually just outside of this press Briefing Room, and there are cameras set up there, so there are almost certainly crews out there anticipating what the president was going to say. Again, i didnt get clear eyes on exactly what was going on outside, but i imagine that those crews were rushed out of that area. As you noted, jim, this is something that happens from time to time at the white house. Just a few years ago, we reported that there was a gentleman who died by suicide just outside the white house and it was put under lockdown. The president was not on the grounds that day. He was down in maralago where i was reporting, but again, this is the sort of thing that happens in this area. Its a very public area. There are folks that have been coming out here to protest, especially in recent months, over Racial Injustice and unrest. So, its still an open question as to exactly what led to this moment, but as you can see, the president from one moment to the next, being approached by the United States secret service, effectively told, we need to go and he just walked out of the press Briefing Room. From what i understand, according to the White House Pool, the exact words were, step outside, sir, were going to have to step outside. President said, oh. And left the room, jim. Thats right. And we should caution our viewers, you know, they sometimes shut down Lafayette Square from time to time. Theyll find a fanny pack or some kind of package that has to be rendered nonthreatening, and so sometimes the park will be shut down, sometimes the north lawn of the white house will be shut down, but it is highly unusual to have the secret Service Break into a live briefing, Live Press Conference that the president is having, and as you were just saying, saying to the president , sir, were just going to have to step outside, according to the notes were getting from the White House Pool and the president saying, excuse me, and the agent saying, step outside. So he had to move fairly quickly. Now we are hearing from some of our colleagues over at the white house, our cnn colleagues, that there was some shouting, perhaps, going on in Lafayette Park that got the attention of the secret service, and some sounds that caught the attention of officers in that area. Were trying to get to the bottom of what those sounds are, but obviously, you know, the viewer at home can surmise for themselves what kind of sounds would draw the attention of Law Enforcement and concern people enough that they have to take this sort of action, and so were trying to get to the bottom of exactly what went on. Were reaching out to our secret service sources, and boris, from your Vantage Point, youre over at our annex location just outside the white house grounds, looking down. What can you can you see anything from your location . As it turns out, there might have been some sounds in Lafayette Park that concerned people. Reporter yeah, so, i was actually preparing for the top of the 6 00 hour, taking down some notes, and i heard noises outside. I heard a ruckus. I heard people shouting. I heard a woman screaming, and then i told our producer and our photographer that something is going on outside. They glanced outside. We heard sirens. We heard some kind of a commotion. Our window here is somewhat limited so we cant really see down the street. But soon after that, we heard what i assume were either secret service or Police Agents asking folks to leave the area, to clear it out. From my Vantage Point right now, i see several folks standing on the roof of the white house, as is usual. Theyre typically up there monitoring Lafayette Park, monitoring this area. I dont see anyone actually inside the park. All right. It looks like the president is not to interrupt you, but the president is walking back in. Lets see whats going on. So, thank you very much. Sorry for that. There was a shooting outside of the white house, and it seems to be very well under control. Id like to thank the secret service for doing their always quick and very effective work, but there was an actual shooting, and somebodys been taken to the hospital. I dont know the condition of the person. Seems that the person was shot by secret service, so well see what