Your immune system protects you, but sometimes it overreacts. Learn how to recognize the signs and regain balance.

Symptoms of seasonal allergies and the common cold can overlap. Learn how to tell them apart so you can get the treatment you need.

Long COVID is arguably the most significant hangover from the pandemic. Here's what has been learned, and what remains ...

This immune overreaction causes inflammation and ulcers or small open sores on the colon’s lining. The combination of inflammation and ulceration causes abdominal discomfort and frequent bowel ...

The virus can damage the immune system in a process called "immune amnesia," raising the risk of other infections even after the person has recovered, explained Dr. Céline Gounder, CBS News ...

But researchers are hoping to change that with a new cell therapy that was able to tamp down the immune system’s overreaction to gluten in mouse models. The study’s results were published in ...