In 2021, just months after the first COVID vaccines debuted, concern was growing about an exceedingly rare but sometimes deadly outcome of certain shots. Two related vaccines—one from AstraZeneca and ...

Testosterone is often treated as a marker of health and vigor, especially in men. But new genetic evidence suggests it’s not all good: higher lifelong levels of the hormone may also increase the risk ...

November 24, 2025 • Our annual reading guide returns with 380+ new titles handpicked by NPR staff and trusted critics. Find 13 years of recommendations all in one place — that's more than 4,000 great ...