Virus

A person in Louisiana has been hospitalized with the United States' first serious case of H5N1 bird flu, following 60 milder cases this year.

Two men from Rochester, New York died from a type of pneumonia after being exposed to a harmful fungus living in bat poop used to grow cannabis.

New World screwworm was largely eradicated from the U.S. and Central America in the 1960s and 1980s, respectively. But the potentially fatal parasite is starting to make a comeback, U.S. officials say.

"Both understood phages as medicinal agents, which the rest of the medical field viewed as nonsensical."

In a new study, the RSV drug nirsevimab was 93% effective at preventing young children from being hospitalized for the respiratory infection.

A new federal order requires that U.S. dairies provide milk samples to the USDA so the agency can test the milk for bird flu prior to pasteurization.

A new laboratory study pinpoints a way H5N1 could evolve to spread from person to person.

Common colds and the flu differ in many ways, including their causes, some of their symptoms and their treatments.

Patients with acromegaly make too much growth hormone, which causes them to grow disproportionately large bones, organs and tissues.

Between 67 and 143 people in the DRC have died of an unknown, flu-like disease, officials have said.