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For herd immunity to have optimal and maximum effect, a significant percentage of the population should...

For herd immunity to have optimal and maximum effect, a significant percentage of the population should be vaccinated to ensure that the probability of people with the condition or infection interacting with susceptible non-vaccinated people is low. True or False??

Math   Statistics-And-Probability   
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The above statement is True.

When a high percentage of the population is vaccinated, it is difficult for infectious diseases to spread, because there are not many people who can be infected. For example, if someone with measles is surrounded by people who are vaccinated against measles, the disease cannot easily be passed on to anyone, and it will quickly disappear again. This is called ‘herd immunity’, 'community immunity' or 'herd protection', and it gives protection to vulnerable people such as newborn babies, elderly people and those who are too sick to be vaccinated.

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