1 day ago · 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 …

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 …

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 …

Innate immunity involves immediate, nonspecific responses to foreign invaders, while adaptive immunity requires more time to develop its complex, specific responses (1). Innate immunity is …

You’ve heard of your immune system, but how does it work? Learn more about the cells and organs that protect your body and help it heal.

What is the immune system? The immune system works to keep germs and other foreign substances out of the body and destroy any that get in. It's made up of a complicated network …

Mar 11, 2025 · Its complex network of cells, organs, proteins, and tissues enables the immune system to defend the body from pathogens. A fully functional immune system can distinguish …

Aug 26, 2025 · Learn about immunity: your body's defense system against bacteria, viruses, and disease. Understand innate, adaptive, active, and passive immunity.

Feb 3, 2025 · What Is Immunity? You're born with a certain level of protection, or "immunity." That means your body has the ability to protect itself from infections and disease.

All immune cells come from precursors in the bone marrow and develop into mature cells through a series of changes that can occur in different parts of the body.