Biden Dips Into U.S. Vaccine Supply to Send 20 Million Doses Abroad

President Biden, heeding widespread calls to step up his response to the pandemic’s surge abroad, said on Monday that his administration would send 20 million doses of federally authorized coronavirus vaccine overseas in June — the first time he has pledged to give away doses that could be used in the United States.

The donation is another step toward what Mr. Biden promised would be an “entirely new effort” to increase vaccine supplies and vastly expand manufacturing capacity, most of it in the United States. He also put Jeffrey Zients,...