Researchers determine how sleep duration, sleep debt, and shift work impact the risk of infections among Norwegian nurses.

Gut microbiota may be the key factor explaining why certain individuals do not respond well to the pneumococcal vaccine-a bacterium that can cause various diseases, such as pneumonia.

The patient’s own doctors couldn’t agree on a cause. One said asthma. Another implicated her age, then 71. A third blamed ...

Public health experts say the United States learned some things from COVID-19, but gaps remain in the public health ...