immune system

People with weakened immune systems who already got two doses of the Pfizer or Moderna COVID-19 vaccines can now get a third shot. But exactly who is eligible? Here's what we know so far.

Scientists say unprepared immune cells appear to be responding to the virus with a devastating release of chemicals, inflicting damage that may endure long after the threat has been eliminated.

Their first epiphanies came during musings over beer, and evolved into a decade of teamwork. Two Harvard researchers explain why they think Alzheimer's disease may be traced to an immunity glitch.

As humans spend more time in space there are questions about how their bodies are being affected. Dr. Krishna Komanduri, a researcher at the University of…