Medically reviewed by Anita C. Chandrasekaran, MD A strong immune system helps protect you from infections by germs such as bacteria, viruses, and fungi. Some signs may show that your immune system ...

Your immune system is like an incredibly sophisticated security team, constantly patrolling your body for threats and neutralizing them before they can cause harm. When it’s working properly, this ...

Many of the effects of climate change play out at a very large scale: Heatwaves that grip entire continents. Flooding that submerges vast swaths of island nations and continental coastal areas. Other ...

Scientists find key protein signals that train the immune system to accept food, opening new possibilities for preventing food allergies.

Our immune system has a dark side: It’s supposed to fight off invaders to keep us healthy. But sometimes it turns traitor and attacks our own cells and tissues. What are called autoimmune diseases can ...

Lingering inflammation from viruses like COVID-19 or HIV can take a lasting toll on the brain. New research shows exactly how specific immune system imbalances lead to memory lapses and slowed ...

The breakthrough treatment could lead to safer cancer therapies and may also help treat autoimmune diseases like lupus ...

Researchers from the University of Southern California studied how social stressors can age the body’s immune system. They found everyday discrimination, stressful life events, life trauma and chronic ...