Biden reaches agreement to buy 200 million more COVID-19 vaccine doses by summer

President Joe Biden announced Tuesday the U.S. has reached an agreement to purchase an additional 200 million coronavirus vaccine doses, a boost that means the U.S. will have enough supply to fully vaccinate 300 million Americans by the end of summer or beginning of fall..

"This is a wartime undertaking. It's not hyperbole," Biden said during remarks on the COVID-19 pandemic at the White House.

Biden outlined the new purchase plans along with an increase in the weekly vaccine allocation to states, tribes and territories from 8.6 million doses to...