Vaccines and Herd Immunity

The video explains herd immunity, a concept where a group provides protection against diseases. It uses a model to show how diseases spread and introduces the basic reproduction number (R naught) to measure this spread. The video discusses how immunity can be gained naturally or through vaccination, highlighting the importance of herd immunity thresholds. It emphasizes the role of vaccines in achieving herd immunity and the risks of not vaccinating enough people.

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