active immunity
Body-made disease protection
Active immunity is protection against disease that develops when the body produces its own antibodies, either after exposure to a pathogen or through vaccination.
Unlike passive immunity, where antibodies are transferred from another source, active immunity involves the immune system learning to recognize and fight specific threats.
It typically lasts longer because the body retains memory cells: The vaccine triggers active immunity that can persist for years.
- vaccinationAdministered immunity booster
- flu shotYearly illness prevention injection
- antibodiesProteins targeting pathogens
- lymphocytesAdaptive immunity cells
- memory cellsImmunity's long-term archive
white blood cells · infection · pathogen · antigen · resistance · protection · disease resistance · T-cells · B-cells · booster · shot · inoculation · defense · fighting · acquired · exposure · fever · response
active immunitypassive immunity
Antibodies received from outside
immunodeficiency · immune suppression · immunocompromise · antiserum · anergy
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