“I don’t know the answer to that question. I just don’t, and the reason I don’t is there are too many variables in there that I don’t have control over, nor do my public health colleagues have control over,” Fauci said. “How many people are going to get vaccinated? How many variants are you going to have? And then you have the thing that we really don’t have, individually, a lot of control over, and that is a global pandemic requires a global response.”