In a new study with mice, a vaccine administered directly to the bladder cleared the bacteria that cause urinary tract infection. Can it work for people?

People with severe COVID-19 and a secondary blood infection had longer hospital stays and poorer outcomes, research finds.

There's growing evidence that Bartonella infection can involve skin lesions and mental symptoms, report researchers.

People who used e-cigarettes in the past were 21% more likely to develop respiratory disease, and current users had a 43% higher risk, a new study finds.

Healing is a complicated process. As people age, higher rates of disease and the fact that old cells lose the ability to divide slow this process down.

COVID-19 cases are skyrocketing across the US. Testing has ramped up over the past few months, but increasing hospitalizations, deaths and test-positivity rates show that the virus is out of control.

We answer some of your questions about the Pfizer vaccine for coronavirus.

'Normal' body temperature has declined in urban, industrialized settings like the US and UK. Anthropologists find the trend extends to Indigenous people in the Bolivian Amazon – but why?

Widely adopted in the US when pandemic precautions kept people home, telehealth faces a challenge as insurance coverage changes, right when its popularity had surged.

Scientists in the UK and Germany discovered a new doorway that the COVID-19 virus uses to infect human cells. This reveals new therapeutic possibilities for blocking the virus.