US booster shots start, even as millions remain unprotected

By LAURAN NEERGAARD and MIKE STOBBE
AP Medical Writers

The U.S. launched a campaign to offer boosters of Pfizer’s COVID-19 vaccine to millions of Americans on Friday even as health officials stressed the real problem remains getting first shots to the unvaccinated. The Centers for Disease Control and Prevention endorsed boosters for some who got their last shot at least six months ago. On the list are seniors and medically vulnerable adults. People whose jobs put them at risk of infection also qualify, after CDC Director Dr. Rochelle Walensky overruled her own advisers who balked at that broader use. President Joe Biden says he’ll get his own booster soon.