The practice, in which users inject the blood of already intoxicated individuals, has fueled one of the fastest-growing H.I.V. epidemics in the Pacific and grown widespread in South Africa.

The meetings allow primary and secondary school councils to shape policy directly with government.

Children under 12 need different versions of Covid vaccines, but many pharmacies and pediatricians’ offices aren’t stocking them.

Acetaminophen’s link to autism is unproven. But hundreds of Americans accidentally overdose on the drug each year, suffering liver damage that can require a transplant or even be fatal.

The practice surged in the 1980s and 1990s, before medical groups began warning it was harmful.

Fred Ramsdell found out about his Nobel Prize nearly 12 hours after it was announced because he was on vacation in the Rockies.

Scientists are searching for the secret in Doug Whitney’s biology that has protected him from dementia, hoping it could lead to ways to treat or prevent Alzheimer’s for many other people.

Wildfire smoke, lead paint and other environmental toxins are health hazards for animals, too.

A better understanding of how pollution affects pets could benefit humans and animals alike.

For some single women in their 30s and 40s, their biological clocks add unwelcome stress to an already fraught process.

Mary E. Brunkow, Fred Ramsdell and Shimon Sakaguchi were awarded the prize on Monday.