Fine, Biden blows the entire 100 million doses in 100 days. How long to get the second 100 million doses manufactured?
Both versions of the vaccine requires a second booster shot within two weeks of receiving the first dose, or else the vaccine doesn’t impart the desired level of immunity.
It doesn’t matter if it it happens or not. It will be reported as successful.
Moderna is a 28-day wait before the second shot.