herd immunity
Herd immunity (also called population immunity or community immunity) occurs when enough people are immune to a disease that it cannot spread effectively, protecting even those who are not immune.
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Related Terms
R₀ (basic reproduction number)
The average number of secondary infections produced by a sin...
basic reproduction number (R₀)
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effective reproduction number (R or Rt)
The average number of secondary infections in a real populat...
effective reproduction number (R(t))
The reproduction number at a given time, accounting for immu...