It’s not a bad sign if you feel fine after your COVID-19 shot.
Luis Alvarez/DigitalVision via Getty Images
It’s normal for different people to mount stronger or weaker immune responses to a vaccine, but post-shot side effects won’t tell you which you are.
Masking up is one way to cut down on risk of COVID-19 infection.
Alex Brandon/Getty Images News via Getty Images
Older coronavirus patients face grimmer outlooks. A virologist explains the aging-related changes in how immune systems work that are to blame.
An artist’s impression of antibodies (red and blue) responding to an infection with the new coronavirus SARS-CoV-2 (purple).
KTSDESIGN/SCIENCE PHOTO LIBRARY / Getty Images
If antibody levels drop dramatically after an infection, what does that mean for immunity? An expert explains how B and T cells contribute to immunity and why antibodies don’t tell the full story.
There are currently no permanent treatments for most patients with inflammatory bowel disease.
PokPak05/iStock/Getty Images Plus
Researchers discover clues to the origin of inflammatory bowel disease and a possible strategy for treatment.
A nursing home resident who tested positive for the virus visits through the window with her daughter.
AP Photo/Ted S. Warren
Different demographics are more or less vulnerable to serious complications from the coronavirus. A virologist explains the aging-related changes in how immune systems work that are to blame.
The only thing standing between invaders such as bacteria, viruses, parasites and fungi and our devastation is our immune system.
The immune system does such a good job most of the time that we only really think about it when things go wrong. But to provide such excellent protection, it must constantly learn.
The innate immune response causes the common signs of inflammation including swelling, pain, heat, redness and loss of function.
The immune system is critical for protecting against illness-causing organisms, such as viruses, bacteria and fungi, which are collectively known as pathogens. Without it, we would quickly become infected…