Add Yahoo as a preferred source to see more of our stories on Google. Can certain infections, such as COVID, leave you more vulnerable to getting another illness? (Getty Images) (Guido Mieth via Getty ...

In a recent preprint* study posted to the medRxiv server, a team of researchers evaluated the impact of hybrid immunity (combining vaccination and recovery from infection) on severe acute respiratory ...

Aspergillus, a common airborne fungus, is inhaled daily by most people without harm. But for those with weak immunity or lung ...

Antimicrobial resistance—when bacteria and fungi defend themselves against the drugs designed to kill them—is an urgent threat to global public health, according to the Centers for Disease Control and ...

Feeling constantly tired and falling sick often? Know why chronic fatigue and frequent infections happen, what weakens ...

Get it early, develop immunity, get back to work: some wonder As COVID-19 numbers climb precipitously, health care workers, first responders and the countless individuals working in "essential ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

Maternal diabetes mellitus is associated with significantly higher infection rates among infants during the first 6 months of life.

Since it was first detected in the U.S. in 2014, H5N1 avian influenza, commonly known as bird flu, has jumped from wild birds ...

Having a COVID-19 infection can shore up your immunity to the virus, but can it also leave you more susceptible to getting sick with other illnesses? That's the theory laid out in a new scientific ...