community immunity
Group disease resistance
Community immunity is the resistance to disease spread that emerges when enough people in a population are immune—through vaccination or prior infection—that transmission chains break down.
Also called herd immunity.
The threshold varies by disease: measles requires about 95% immunity, while less contagious diseases need lower coverage.
Once community immunity is established, even unvaccinated individuals gain some protection.
- vaccine efficacyHow well inoculations prevent illness
- booster dosesAdditional vaccinations after primary series
- safety in numbersProtection through group size
- altruistic behaviorActions benefiting others freely
- quarantine protocolsRules for separating the sick
shots in arms · protective bubble · peer influence · vaccine hesitancy · social norms · contact tracing · memory cells · cold chain logistics · ring vaccination · surveillance systems · vulnerable populations · disease eradication
- immunity typesantibodies, vaccines, disease resistance, antitoxins, white blood cells
- vaccinesvaccine, Pfizer, polio vaccine, Moderna, vaccines
community, immunity, commune, communal, communally, communist, communism, communion, communicate