A boy of 10 years had chickenpox. He is not expected to have the same disease for the rest of his life. Mention, how is it possible?
When the boy suffered from chickenpox, first time his body’s immune system exhibited primary response. Along with that, the memory of chickenpox virus was stored by the immune system. Now, whenever the same virus will attack this boy, the immune system will produce an intense response, preventing the body from getting chickenpox again. Thus, protecting the boy from getting infected by chickenpox ever again in life.