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the immunity or resistance to a particular infection that occurs in a group of people or animals when a very high percentage of individuals have been vaccinated or previously exposed to the infection.

herd immunity n.


Read Also:

  • Herding

    [hurd] /hɜrd/ noun 1. a number of animals kept, feeding, or traveling together; drove; flock: a herd of cattle; a herd of sheep; a herd of zebras. 2. Sometimes Disparaging. a large group of people: The star was mobbed by a herd of autograph seekers. 3. any large quantity: a herd of bicycles. 4. the […]

  • Herding-dog

    noun 1. one of any of several breeds of dogs used originally for herding livestock, including the Belgian sheepdog, collie, German shepherd, and Old English sheepdog.

  • Herd-instinct

    noun 1. the impulse or tendency toward clustering or acting in a group, especially the presumed instinct toward or need for gregariousness and conformity. noun 1. (psychol) the inborn tendency to associate with others and follow the group’s behaviour

  • Herdsman

    [hurdz-muh n] /ˈhɜrdz mən/ noun, plural herdsmen. 1. a herder; the keeper of a herd, especially of cattle or sheep. 2. (initial capital letter) Astronomy. the constellation Boötes. /ˈhɜːdzmən/ noun (pl) -men 1. (mainly Brit) a person who breeds, rears, or cares for cattle or (rarely) other livestock in the herd US equivalent herder n. […]

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