Intro to Epidemiology
Herd immunity is a form of indirect protection from infectious diseases that occurs when a large percentage of a population becomes immune to the infection, either through vaccination or previous infections. This immunity helps to slow or stop the spread of disease, protecting those who are not immune, such as individuals with weakened immune systems or those who cannot be vaccinated. By reducing the overall amount of the virus or bacteria circulating in the community, herd immunity plays a crucial role in controlling infectious disease outbreaks and maintaining public health.
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