The innate immune system is an alternate defense strategy and is the dominant immune system response found in plants, fungi, prokaryotes, and invertebrates (see § Beyond vertebrates).

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 …

Aug 5, 2025 · Innate immunity is the body’s first line of defense. It is ancient, fast, and brutally efficient. From the moment you are born—and in fact, even before—you possess an inborn …

The second line of defense of the innate system includes chemical signals that produce inflammation and fever responses as well as mobilizing protective cells and other chemical …

Innate immunity serves as a global surveillance system, sensing external stimuli and assessing cellular fitness to initiate context-specific responses that combat infections and maintain tissue …

Jan 25, 2021 · 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 …

Innate immunity, unlike acquired immunity, has no memory of the encounters, does not remember specific foreign antigens, and does not provide any ongoing protection against future infection.

Nov 27, 2025 · The innate immune system is the body’s first line of defense, providing an immediate, non-specific response to foreign threats. Its components are pre-programmed to …

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 …

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 …