Why 70% Vaccination Goal? No 'Mathematical Certainty,' Fauci Says; 'Seemed Like a Reasonable Number'

President Biden's COVID-19 response team says the United States has not yet met its "aspirational" goal of having 70 percent of all adults receive at least one vaccine dose by July 4th.

And where did that 70 percent target come from?

Dr. Anthony Fauci told a news conference on Tuesday that 70 percent "seemed like a reasonable number to do. It was empiric. I mean, there was no mathematical certainty to it. But I think most--not, I think. I know that most of us agreed that that was quite a...