Biden says 90% of all adults will be eligible for COVID-19 vaccine by April 19

President Biden announced Monday that 90% of all American adults will be eligible for the COVID-19 vaccine by April 19, about two weeks before May 1, the date he has set to have enough doses for all adults. But Mr. Biden on Monday also warned Americans should not "let up now" amid rising COVID-19 infection increases and called on governors who have lifted mask mandates to reinstate them. 

"If we let our guard down now, we could still see the virus getting worse, not better," Mr. Biden said Monday. "We're giving up hard-fought, hard-won gains. As much as we're doing, America, we have to be doing more."    Mr. Biden echoed comments from Dr. Rochelle Walensky, the director of the Centers for Disease Control and Prevention, who warned earlier Monday that the steady rise in new coronavirus cases, hospitalizations and deaths has left her with a sense of "impending doom."