Research suggests we should embrace feeling down when ill.

Your immune system is often able to fend off pathogens it’s never seen before. But defending your body against all of them all at once is a tough challenge.

Researchers have discovered that older mice and those with a specific gene variant have "exhausted" immune cells in their brains.

Hypochlorous acid produced by a cell's immune response could be a potent weapon against a common fungal pathogen, Candida albicans.

Viruses can get into cells in several ways. Figuring out how to stop them from entering in the first place is a key to developing better vaccines and stopping future pandemics.

Dietary supplements claim to be able to ‘boost your immune system’ to combat disease. But attaining immune balance through a healthy lifestyle and vaccination is a safer bet to keep in good health.

Slimy snot is an important part of how your immune system wards off germs and fights back from infection.

Research in mice shows that exercise mobilizes inflammation-countering T cells, lowering levels of interferon — a key driver of chronic inflammation, inflammatory diseases, and aging.

Itch-sensing neurons in your skin are intertwined with your immune cells. Counterintuitively, the molecule that connects them triggers responses that both worsen and improve skin conditions.

EVEscape uses evolutionary and biological information to predict how a virus could change to escape the immune system.