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The COVID vaccines haven't proved very effective for people living with organ transplants. But getting a third dose of the mRNA vaccines gave a big bump in antibody levels in a new study.

In one of the hardest hit countries in the world, the main strategy is a so-called early treatment combo of unproven medications — endorsed by President Jair Bolsonaro.

A plaque-busting Alzheimer's drug called Aduhelm has yet to prove it can preserve memory and thinking. Even so, its approval by the Food and Drug Administration is making some patients opitimistic.

Juneteenth is an annual celebration held on June 19 to commemorate the end of chattel slavery in America.

Since the campaign trail, President Biden has said he wants to close privately run immigrant detention centers. But immigrant advocates say his administration isn't following through on his promises.

Intelligence agencies from the U.S. and Russia are both trying to figure out what the other side is going to say, a longtime CIA operative says. China is probably trying to listen in, too.

The shift in health policy in most of the U.K. reverses a decades-old rule that limited donor eligibility on perceived risks of contracting HIV/AIDs and other sexually transmitted infections.

Indiana is one of eight states that are scheduled to end expanded pandemic unemployment benefits this weekend.

Despite being hit hard early in the pandemic, New York City lags behind in vaccinating people 65 and older, and its efforts to reach the homebound and disabled have been disorganized.

In a new book, Bryan Burrough and co-writers Chris Tomlinson and Jason Stanford challenge the historical lore of the Alamo — including the story that Davy Crockett refused to surrender.