>> if you can't be certain something is safe right now, would the cdc recommend it for the time being that people not do it? >> what we are recommending, if you are concerned about your health issues in light of this investigation, that you consider not using e-cigarettes or vaping products until we know more. . >> it is a warning jay jenkins has heard. >> i certainly won't do it again. >> you will not? >> i will not. i took a chance and lost once. but luckily, they were able to save my life. >> dr. sanjay gupta there "on the story". stay with us next hour as this very important conversation continues. sanjay will talk with his own kids and their friends about why, despite the risks, it's so appealing, for people to vape. another tough weekend for the british prime minister boris johnson as his brexit plan falls flat with european leaders. and in france, they're preparing for that worst-case scenario.