20M is the number they switched to after failing to meet their estimate from 3 months ago. In October, HHS Secretary Azar said that Operation Warp Speed would d

20M is the number they switched to after failing to meet their estimate from 3 months ago. In October, HHS Secretary Azar said that Operation Warp Speed would deliver 100 million doses by the end of the year. https://thehill.com/changing-america/well-being/prevention-cures/520297-us-could-have-enough-covid-19-vaccine-for-every https://thehill.com/changing-america/well-being/prevention-c...