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 ...

The circumstances surrounding a study on a deadly virus could hardly have been more dramatic. One of its first authors was forced to flee his homeland when it became a war zone. More than 2,000 ...

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 ...

When food is scarce, stress hormones direct the immune system to operate in "low power" mode to preserve immune function ...

Add Yahoo as a preferred source to see more of our stories on Google. A vial of the measles, mumps and rubella vaccine is on display at the Lubbock Health Department Wednesday, Feb. 26, 2025, in ...

The varicella-zoster virus causes both chickenpox and shingles infections. Initially, the virus causes a chickenpox infection. If it reactivates later, shingles can develop. The chickenpox vaccine ...

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 ...

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

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 ...