You do not need to be vaccinated again if you have had chickenpox. Chickenpox is an acute infectious disease caused by the varicella zoster virus when it first infects the human body. Antibodies may appear in the body after the disease occurs, and generally do not cause reoccurrence of the disease, and the antibodies are carried for life. If varicella zoster virus re-infects the human body, it will stimulate the body to produce the corresponding antibodies again, in this case it is an immune memory response, so there is no need to re-vaccinate. Since the body already has enough antibodies against varicella zoster virus, vaccination is not necessary. If you have had chickenpox and still want to be vaccinated, it is recommended that you consult a doctor and get vaccinated under the doctor’s supervision.