Chickenpox is an infectious disease caused by varicella-zoster virus, and its prevention is divided into the following three aspects: 1, prevention before exposure to chickenpox, you can carry out varicella vaccination, usually 2 injections, with an interval of 3 months, about 90% of chickenpox can be prevented; 2, prevention after exposure to chickenpox, for the body’s poor immune function, after exposure to the chickenpox virus, you can consider the 10-day injection of Herpes zoster-specific immunoglobulin, at the same time for normal patients, after contact with chickenpox should be isolated for observation for 3 weeks; 3, drugs, that is, antiviral drug prevention, for immunodeficiency patients, generally within 9 days of contact with chickenpox acyclovir treatment for 1 week, can effectively control the severity of the disease.