noun
a form of indirect protection from infectious disease that occurs when a large percentage of a population has become immune to an infection, whether through previous infections or vaccination, thereby providing a measure of protection for individuals who
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The country is aiming to achieve herd immunity through widespread vaccination.
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Once enough people are vaccinated, we can reach herd immunity and get back to normal.
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Hey, have you heard about that herd immunity thing? It's when enough people are immune to a disease.
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In the battle against the virus, herd immunity is like having a shield of protection around the community.