The capacity of a normal organism to remain unaffected by microorganisms and their toxins. It results from the presence of naturally occurring ANTI-INFECTIVE AGENTS, constitutional factors such as BODY TEMPERATURE and immediate acting immune cells such as NATURAL KILLER CELLS.

Synonyms: Innate Immune Response, Native Immunity, Natural Immunity, Innate Immunity, Immunity, Innate, Immunity, Natural, Immunity, Native, Immune Responses, Innate, Immunity, Non Specific, Immunity, Non-Specific, Innate Immune Responses, Immune Response, Innate, Natural Resistance, Resistance, Natural, Non-Specific Immunity