approves a fourth vaccine dose for people most vulnerable to covid-19, becoming the first country to do so. covid also impacting the high seas. the cdc now investigating or closely monitoring nearly 90 cruise ships following coronavirus outbreaks on board there. the situation is so bad the agency now telling the public to avoid cruise travel, regardless, by the way, of your vaccine status. we have got an incredible team standing by with all of the information that you need to know. vaughn hillyard is at new york's laguardia airport, priscilla thompson times square, dr. irwin is founding director at the national center for disaster preparedness joining you see as well. doctor, let's talk first and address this piece coming out of the "new york times" with south africa declaring that it is now on the other side of their omicron outbreak, it's been about six weeks for them that they have had to deal with this. of course, they had the jump in cases that we have been experiencing over the last