Years: Most vaccine immunity lasts for 10-20 years. They immunity wanes over time. For some this will create a susceptibilty. The body has a remembering response (anamnestic) and for many when immunity wanes and the person is exposed to the illness then the anamnestic response will lead to a healthy immune response.Others may get the illness. Susceptibility can be reduced with a healthy lifestyle.
Answered 5/10/2019
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6 doctors weighed in across 2 answers
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