Prognosis

Biden's Booster Crusade Limps to Finish Line, Dogged by Uncertainty

Only a portion of the U.S. will be eligible despite a White House drive for wider access

U.S. President Joe Biden delivers remarks on the COVID-19 response and the vaccination program

Photographer: Anna Moneymaker/Getty Images North America
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The U.S. will begin giving Covid-19 booster shots to millions of Americans on Friday — a watershed moment in the nation’s battle against the pandemic that officials hope will beat back another brutal winter wave of infections.

But even after months of internal debate between political appointees and health and science officials in the Biden administration, little consensus has emerged on whether widespread boosters are medically necessary or morally just.