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It is regarded as a positive externality of high levels of immunity, producing an additional benefit of disease reduction that would not occur had no herd immunity been generated in the population. [ 95 ] [ 96 ] Therefore, herd immunity's inclusion in cost–benefit analyses results both in more favorable cost-effectiveness or cost–benefit ...
Targeted immunization strategies are approaches designed to increase the immunization level of populations and decrease the chances of epidemic outbreaks. [1] Though often in regards to use in healthcare practices and the administration of vaccines to prevent biological epidemic outbreaks, [2] these strategies refer in general to immunization schemes in complex networks, biological, social or ...
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Several countries have started giving COVID-19 vaccinations but the World Health Organization's chief scientist says it won't be enough to reach worldwide herd immunity in 2021. She stressed ...
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Herd immunity against the novel coronavirus could require vaccination rates approaching as high as 90%, Dr. Anthony Fauci, the most prominent U.S. infectious disease expert, said in an interview ...
Strong herd immunity reduces this vulnerability. Increasing herd immunity during an outbreak or when there is a risk of an outbreak is perhaps the most widely accepted justification for mass vaccination. When a new vaccine is introduced, mass vaccination can help increase coverage rapidly. [43]
If the proportion of the population that is immune exceeds the herd immunity level for the disease, then the disease can no longer persist in the population and its transmission dies out. [28] Thus, a disease can be eliminated from a population if enough individuals are immune due to either vaccination or recovery from prior exposure to disease.