Immunity, Herd

"Immunity, Herd" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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The non-susceptibility to infection of a large group of individuals in a population. A variety of factors can be responsible for herd immunity and this gives rise to the different definitions used in the literature. Most commonly, herd immunity refers to the case when, if most of the population is immune, infection of a single individual will not cause an epidemic. Also, in such immunized populations, susceptible individuals are not likely to become infected. Herd immunity can also refer to the case when unprotected individuals fail to contract a disease because the infecting organism has been banished from the population.


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This graph shows the total number of publications written about "Immunity, Herd" by people in this website by year, and whether "Immunity, Herd" was a major or minor topic of these publications.
Bar chart showing 9 publications over 8 distinct years, with a maximum of 2 publications in 2007
To see the data from this visualization as text, click here.