infection

Respiratory viruses, including COVID, flu and RSV, are spreading across the U.S. — and so are other infections. So how long are you contagious with some of the more common ones? Find out here.

New York has one confirmed polio case but health officials say wastewater surveillance indicates there may be hundreds of people infected. While most Americans are vaccinated against polio, experts say the case should serve as a wake-up call to those who aren’t. Here’s what you need to know.

South African scientists are warning that the new omicron variant may be causing more reinfections among COVID-19 survivors than earlier virus mutants.

The rare parasite was found in samples of the water at a splash pad where the child was playing in early September.