Nicoletta Lanese

In very rare instances, the live microorganisms in probiotics can cause dangerous infections.

A new study that looked at 20 years of medical data from millions of people found a link between cannabis use and specific cancers.

Here's the brain science of breaking, the dance style making its Olympic debut in Paris.

California officials are investigating cases of valley fever tied to a recent music festival.

The World Health Organization will soon convene a committee to decide if the ongoing mpox outbreak constitutes a "public health emergency of international concern."

There are now RSV vaccines approved for older adults and for pregnant people, and antibody shots (not vaccines) available for babies. What's the difference?

The CDC has clarified and narrowed its recommendations for which older adults should get an RSV vaccine.

A drug-resistant bacterium that causes severe infections has been spreading globally, and it's now in at least 16 countries, the WHO warns.

Olympic triathlon racers finally dove into the Seine following postponements due to poor water-quality test results. Will the water stay swimmable?

Scientists are developing an engineered parasite to get drugs into the brain.

Scientists hope a new blood test for colorectal cancer could improve screening rates.

The world's strongest lifters on record won acclaim for hoisting thousands of pounds into the air at one time. Could they ever go heavier?

An anesthesiologist contracted at various Oregon health care facilities did not practice proper infection control, posing a risk to patients.

A newly identified hormone dramatically strengthens bones in lab studies and could eventually lead to new treatments for fractures and osteoporosis.

Bird flu in cows and goats has raised alarm in the U.S. To date, four people are thought to have caught the virus from cattle, but the risk to the general public is low.

A fourth person in the U.S. has caught bird flu after working with infected cows on a farm.

The FDA will no longer allow BVO in food due to safety concerns revealed in studies.

A new study in mice and human cells suggests that a small molecule can help reverse signs of aging by extending telomeres and modulating key genes.

A man in Mexico died after catching the world's first laboratory-confirmed case of H5N2 bird flu in humans. However, authorities think he likely died of existing conditions, rather than the infection itself.

The Supreme Court of the United States has now issued a ruling about a widely used abortion pill. Here's what you should know.

In a 9-0 ruling, the court determined that an anti-abortion collective didn't have legal standing to raise the case against mifepristone to the Supreme Court.

Health officials warn that serious illnesses have been tied to Diamond Shruumz brand chocolate bars, cones and gummies.

The pharmaceutical company Moderna announced promising results from the ongoing trial of its new vaccine, mRNA-1083.

A difficult-to-treat form of ringworm can spread via sex and has now been seen in the U.S.

A company that ships whole cucumbers from Florida has recalled potentially contaminated produce.