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.

Neuromyelitis optica spectrum disorder (NMOSD) is a condition that affects your eyes and spinal cord. It is an autoimmune disorder where the immune system attacks healthy cells in the nervous system, ...

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 ...

As long as humans have been traveling into space, astronauts have experienced significant health effects from the extreme conditions of space flight, notably the reduction of gravity. Two Buck ...

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 ...

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