Infectious Disease

For decades, Zika was considered a mild virus that rarely made people ill. Suddenly it seems to be causing serious problems and is spreading across the Americas. Here's the latest news.

It's not the tick that causes Lyme disease, but the bacteria that live in its spit. Scientists at the Mayo Clinic have found a second bacterium capable of causing the disease in people.

Discovery of Zika virus in the saliva and urine of infected people is concerning but may not mean the pathogen can actually be transmitted through those fluids, experts caution.

The CDC reported the first case of sexually transmitted Zika virus in the U.S. related to the current outbreak. It's happened before. Here's what we know about how the virus could move between people.

Our experience with the rubella virus, which can cause miscarriages or serious birth defects if a woman gets infected while pregnant, may help scientists figure out how to combat Zika virus.

The Centers for Disease Control and Prevention and the National Institutes of Health say they're working to combat Zika. Their plans include developing lab tests and a vaccine.

Artist Rogan Brown peers into the invisible worlds of microbes, then uses their forms as the inspiration for large paper sculptures that seem at once familiar and profoundly alien.

Selling little turtles as pets has been illegal for decades because they harbor salmonella and make children sick. But a resurgence of cases shows that the reptiles are still on the market.

Ebola's physical legacy doesn't end when a patient leaves the hospital. A follow-up of the small group of patients treated in the U.S. finds many experienced various symptoms for months.