Michaeleen Doucleff

An outbreak of botulism caused by nacho cheese sauce from a gas station has hospitalized nine people and killed one man in northern California.

Two travel tips are often overlooked by clinicians, and can be especially helpful when people are headed to places with less-than-ideal plumbing and sewage systems.

We think of antibiotic-resistance as a modern-day problem. Now scientists have evidence that these superbugs have been around for eons. Clues to their origin are offering clues to their defeat.

A firestorm has erupted over the ethics of using that image on Facebook to promote a photo contest — and the broader issue of how Western media depicts young women and girls in poor countries.

Officials are working on an emergency import deal for another vaccine that is not licensed in the U.S. Even then, a limited number of doses will be available at only a small number of clinics.

An inexpensive drug could dramatically reduce the number of deaths of mothers from bleeding after childbirth in low- and middle-income countries around the world.

The disease-spreading bugs are creeping north in the states. But will they bring diseases like Lyme and Zika with them?

An outbreak in Brazil isn't slowing down as predicted. Dr. Anthony Fauci calls it "a potential threat" to the U.S.

Farmers in a remote Ugandan tropical forest suffered from an excruciatingly painful foot ailment. Usually parasitic worms are the cause — but not this time.

If you're traveling this spring, be sure you're vaccinated. 2017 is shaping to be bad year for the measles, with thousands of cases in Italy and Romania. And vaccine coverage is stagnating worldwide.

The Zika virus continues to impact a small number of pregnant women and their babies in the U.S., and there is no sign of it slowing down. "Zika is here to stay," the CDC's acting director says.

Scientists predicted that more than 1,000 babies would be born with the birth defect in Brazil last year. That never happened. Why?

Scientists expected a surge of severe birth defects in Brazil because of the Zika outbreak. But that didn't happen last year. Researchers are re-examining the link between Zika and birth defects.

It's aimed at rotavirus, a nasty pathogen that can cause diarrhea and kills more than 500 children a day. The secret to the vaccine is the same thing that makes space ice cream so cool.

Move over Japanese women. You've been dethroned as the population with the healthiest hearts. This group of people can fight off heart disease even into their 80s. What's their secret?

A pandemic is likely to crop up in the next few decades, many scientists predict. To help readers prepare, NPR created its first-ever Pandemic Preparedness Kit. But it's not your traditional kit.

The world is seeing more and more new diseases, and the U.S. is no exception. We're living in a hot spot for tick-borne diseases. Some are deadly. The key to stopping them may be an unlikely critter.

One scientist is predicting a risky year for tick-borne Lyme disease in the Northeast, and it's spreading. But don't panic. We've got tips.

Lyme disease is spreading, and this summer is shaping up as a whopper. Why has the tick-borne illness gotten so bad? The answer traces back to something the colonists did more than 200 years ago.

People were dropping dead in Malaysia, and no one could figure out why their brains were swelling. A young scientist solved the mystery. Then he had to get people to believe him.