The big news on Covid last week was the decision by the CDC and FDA to call for a nationwide halt to delivering the Johnson & Johnson vaccine while they investigate a rare blood-clotting disorder. Our guest, Dr. Angela Rasmussen, is a virologist and one of the most well-known and oft-quoted scientists on Covid vaccines. Â She has written for Forbes, Foreign Affairs, Slate, the Guardian, and Leapsmag, and appeared many times in media outlets including the New York Times (including an op-ed last week), the Washington Post, National Public Radio, ABC, NBC, CNN, CBC, and BBC. Â And last week, she appeared in a really good explanatory article on the Johnson and Johnson vaccine by Katherine Wu in The Atlantic. So we invited her to walk us all through what we need to know about the J&J pause and the fight against Covid in general.