herd immunity
noun/ˌhɜːd ɪˈmjuːnəti/
/ˌhɜːrd ɪˈmjuːnəti/
[uncountable]- protection from a disease that happens if a large percentage of the population is immune to it (= unable to catch it, for example because they have been vaccinated)
- Herd immunity can be achieved if 95% of children are vaccinated.
Check pronunciation:
herd immunity