Your immune system is a network of organs, white blood cells, proteins and chemicals that work together to protect you from invaders (like germs) that can harm you.

The immune system is what protects your body from diseases and infections. It's the bodily system that produces the immune response to defend your body from foreign substances, cells, and tissues.

In biology, immunity is the state of being insusceptible or resistant to a noxious agent or process, especially a pathogen or infectious disease. Immunity may occur naturally or be produced by prior …

Immunity refers to the body’s ability to prevent the invasion of pathogens. Pathogens are foreign disease-causing substances, such as bacteria and viruses, and people are exposed to them every …

The immune system is constantly working to protect the body from infection, injury, and disease. It relies on an adequate supply of nutrients for its baseline functions as well as for ramping up its activity …

Jul 30, 2024 · There are two types of immunity: active and passive. Immunity to a disease is achieved through the presence of antibodies to that disease in a person's system. Antibodies are proteins …

Aug 26, 2025 · Immunity refers to the state of being resistant to a harmful agent, especially a pathogen or infectious disease. For many years, immunity was simply understood as the body’s resistance to …

Mar 11, 2025 · The immune system is the body’s tool for preventing or limiting infection. Its complex network of cells, organs, proteins, and tissues enables the immune system to defend the body from …

Jan 3, 2026 · The immune system is a group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is conferred …

Feb 9, 2025 · At its core, immunity is the ability of an organism to resist harmful microorganisms or viruses through a highly specialized system of cells, tissues, and organs. This system, known as the …