Question

A boy of ten years had suffered from chickenpox. His grand mother consoled him that he is not expected to have it for the rest of his life. Whether his grandmother is right? If so how it happens?

Answer 1

The infection produces not only antibodies but also generates memory in the lymphocytes. These cells recognize the pathogen on subsequent attack and generate antibodies to neutralize the pathogen, so his grandmother is right and the boy will not get the disease for rest of his life.