herd immunity

名词 n.
中文释义
英 /ˈhəːd ɪˈmjuːnɪti/    美 /ˈhɚd ɪˈmjunəti/|[-ɾi]

英文释义

名词 n.
  1. The indirect protection against the spread of a contagious disease in a given population caused by the immunity of a significant proportion of the population to that particular disease; the immunity may have been obtained through having survived the infection or through vaccination. countable,uncountable
    — During the years that the herd was being replenished by purchase abortions were frequent, but that practice was discontinued, and the heifer calves born in the herd have been raised. [...] Thus a herd immunity seems to have developed as a result both of keeping the aborting cows and raising the calves.

词形变化

herd immunities plural

词源

From herd + immunity, first identified in herds of cattle.
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