The 'mystery virus' has sparked fears of another devastating pandemic due to videos of patients being treated in overwhelmed ...

Tularemia, or "rabbit fever," is an infectious disease that normally affects animals but can spread to humans, sometimes via ...

Long COVID, a condition that causes symptoms such as fatigue and brain fog months after infection, affects millions and ...

Some of the genetic samples contained mutations that in theory might help the bird flu virus, H5N1, infect people more easily. One of those mutations was reported last month in a viral sample ...

Although bird flu usually does not infect people, there have been some rare cases of human infection with these viruses, according to the U.S. Centers for Disease Control. Last month, a patient was ...