Tanya Lewis: Hi, and welcome to COVID, Quickly, a new Scientific American podcast series! Many Black and Latino households are less likely to have high-speed Internet and the time to spend online booking vaccine appointments. Why is there so much controversy over the AstraZeneca vaccine? Earlier this week, the company put out a press release saying the vaccine was 78 percent effective at preventing COVID in a U.S. trial. Fischman: Come back in two weeks for the next episode of COVID, Quickly!