Before the chickenpox vaccination was available, children were often purposely exposed to the virus at
young age. What was the reason for doing this?

ANSWER: Children were purposely exposed to the virus at a young age because once this virus enters in a human body, the body gradually develops immunity and a resistance to this virus, and hence, later after it's cure there are almost no chances of getting the virus of chickenpox again in a same body.

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Before the chickenpox vaccination was available, children were often purposely exposed to the virus at young age. What was the reason for doing this?

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Before the chickenpox vaccination was available, children were often purposely exposed to the virus at
young age. What was the reason for doing this?