But the nation’s top infectious disease specialist — who once disputed that the Biden team was starting from scratch — now says that the Biden team deserves credit for the current state of the vaccine roll out. So, if he did absolutely nothing, we would have done 100 million in, in the first 100 days, even if he didn’t show up,” Hogan said. First there would be enough vaccine supply for all Americans by the end of July, then the end of May. The Biden team insisted this would not affect their supply or vaccination targets, and the vaccine is now back in use. With vaccine supply secured, it’s now set to outpace demand at a critical moment, with Covid-19 variants on the rise.