imunita
Imunita is the state or condition of being protected against disease, arising from the activity of the immune system. It can be innate, present from birth, or adaptive, developed in response to exposure to pathogens, vaccines, or other antigens. Immunity protects individuals and, in some cases, populations through reduced susceptibility and, in the case of herd protection, lower transmission.
The immune system comprises innate and adaptive components. Innate defenses include physical barriers such as skin
Vaccination is a primary means of inducing adaptive immunity without causing disease, by introducing harmless forms
Clinical relevance varies with immune function. Immunodeficiencies, whether primary (genetic) or secondary (acquired), increase infection risk.
Measurement of immunity includes antibody titers, cellular assays, and records of vaccination history. Maintaining robust immunity