What is herd immunity or community immunity for COVID-19? How does it happen?

Question: 

What is herd immunity or community immunity for COVID-19? How does it happen? 

Answer: 

Herd immunity is achieved when most of a population is protected against a disease. This is different with each virus, and for COVID-19, we do not know what percent of the population we need vaccinated in order to reach herd immunity. We do know though, that the more people in a community who are vaccinated, the harder it is for a disease to spread. If a person infected with a disease comes in contact only with people who are immune (have been vaccinated), the disease will have little opportunity to spread. The type of protection created when most people are vaccinated is called herd immunity or community immunity. It means that many of us are protecting each other, and especially the most vulnerable among us. Watch a video that shows how herd immunity works here:

 

 


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Date last reviewed: 
Monday, Mar 08, 2021