Hantaviruses are spread by rodents and can cause deadly respiratory and kidney illnesses in humans. It recently killed Betsy Arakawa, actor Gene Hackman's wife, in a widely covered case.

Nocardiosis is a rare bacterial infection that attacks the lungs, skin and brain.

Scientists took 10 years to figure out how one type of superbug gains its ability to infect diverse bacterial species. When prompted, Google's new AI "co-scientist" gave them the answer in two days.

If life exists on other planets, it needs to be adaptable to extreme environments. To get a clue of what it might look like, we can turn to a surprising place: the human gut.

A woman developed an array of symptoms shortly after returning from a vacation, and parasites turned out to be the culprit.