And is part of the group of scientists that is evaluating the trial data and making a judgment on whether america should start vaccinating people with the pfizer vaccine. His answer is going to be yes btw.

Covid 19 is new and not all that well understood in some basic ways that again make this uncharted territory for vaccine development. Offit isn't concerned about ADE with sars cov 2 but ADE was shown to occur in some animal models for sars cov 1. We don't know how immunity to the wild virus functions yet in some ways. the possible risk these unknowns may play seems to be outweighed for the vast majority of in the loop scientists informing public policy choices by the amount of suffering these vaccines seem like they can begin preventing basically today. But acting like it's all roses and there are NO question marks seems more rhetoric than reality