Researchers have sought an easier way to reduce the number of viral respiratory infections, from the common cold to flu, that hit us year after year. They say the nose is the best place to start, and that an ointment in your medicine cabinet could do the trick…

PFAS are “forever chemicals” that poison your drinking water and sneak into your body via furniture, clothing, take-out and dental floss, too. They’re hard to avoid. And now we know how they cause disease: by destroying the most important parts of our immune system…

Your immune system defends against injury and disease. It attacks pathogens, neutralizes harmful substances and fights disease-causing changes in the body. But less has been known about its role in depression, until experts realized it can get hacked — by stress.

A metabolic by-product you can trick your body into producing more of appears to supercharge immune cells as they fight infection and disease, research is finding. There are a couple of ways to get them going…

People with diabetes are at higher risk of developing serious lung infections following a respiratory infection. Diabetes can weaken the immune system, but its specific effects on the lungs have been unclear, until now. What research has found may signal a way to dial it back…

A tiny organ that’s often ignored is the key to helping keep colds and flu away and your immune system balanced to avoid autoimmune disease. But it’s also connected to immune system aging. Here’s how to keep yours youthful…