The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

The study did not involve cases from the latest omicron surge. Both vaccination and a prior infection provided protection against another infection and hospitalization due to COVID-19 during the ...

Select gut bacteria protect mice against post-influenza virus secondary bacterial pneumonia, according to a study published ...

This study shows that SARS-CoV-2 infection and vaccination generate strong, highly specific spike-binding immune responses ...

Discover new COVID variant symptoms in 2026, understand respiratory infection risks, and learn effective protection ...

Participants with prior infection were more likely than vaccine recipients to retain some detectable antibodies.

A new report says that 13 percent of cancers are linked to bacteria or viruses. Vaccines and treatments offer powerful protection. By Nina Agrawal Most cases of stomach cancer are caused by bacteria.