Biden Booster Push Limps to Finish, Dogged by Doubts (1)

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.

President Joe Biden has endured opprobrium abroad for his aggressive effort to get a third shot into the arms of American adults before much of the world has received even one ...