WASHINGTON — COVID-19 drove a dramatic increase in the number of women who died from pregnancy or childbirth complications in the U.S. last year, a crisis that has disproportionately claimed Black and Hispanic women as victims, according to a government report released Wednesday.

U.S. health officials say 4.4 million Americans have rolled up their sleeves for the updated COVID-19 booster shot. The Centers for Disease Control and Prevention posted the count Thursday as public health experts bemoaned President Joe Biden’s recent remark that “the pandemic is over.”

The federal government is releasing millions of Moderna booster shots that were delayed by the Food and Drug Administration as a result of a safety inspection at an Indiana packaging plant, even as states report shortages and encourage patients to use Pfizer boosters instead.

President Joe Biden’s top medical adviser warned in an interview with the Financial Times that a broad refusal of vaccines against COVID-19 may undermine efforts to immunize children and contain future illness outbreaks.