The innate immune system or nonspecific immune system[1] is one of the two main immunity strategies in vertebrates (the other being the adaptive immune system).

The innate immune system is a subset of the human immune system that produces rapid, but non-specific responses to pathogens. Unlike the adaptive immune system, the innate system …

When pathogens enter the body, the innate immune system responds with a variety of internal defenses. These include the inflammatory response, phagocytosis, natural killer cells, and the …

The concept of ‘innate immunity’ embraces all sorts of measures that exclude, inhibit, or slow down infections with little specificity and without adaptation or generation of a protective memory.

In contrast to adaptive immune responses, which take days to arise following exposure to antigens, innate immunity consists of the defenses against infection that are ready for …

Jun 17, 2025 · This topic will review the cells, proteins, and receptors that comprise the innate immune system, the functional differences between innate and acquired immune responses, …

Our innate immune system is almost fully developed when we are born, unlike the adaptive immune system, which develops later and grows with us as we age and encounter new …

Innate (natural) immunity is so named because it is present at birth and does not have to be learned through exposure to an invader. It thus provides an immediate response to foreign …

Apr 29, 2025 · Innate immunity serves as the body’s first line of defense against pathogens, offering a rapid response to invading microorganisms. Unlike adaptive immunity, which tailors …

Aug 30, 2024 · Innate immunity is the body’s initial and broad-spectrum defense mechanism against infections and injuries. It involves a range of components, including ILCs, NK cells, …