Varicella is an acute infectious disease caused by varicella-zoster virus infection and is highly contagious. The infectious intensity of chickenpox can be illustrated by the characteristics of the infectious source, the transmission route and the susceptible population. The infection of chickenpox is mainly found in the upper respiratory tract and the herpes fluid, and is contagious from the onset of the disease to the time when the rash is completely crusted over. The company’s main business is to provide a wide range of products and services to its customers. If a pregnant woman suffers from chickenpox, her fetus may also be infected, and the infected population is also more widespread. Therefore, in addition to vaccination against chickenpox, it is also important to strengthen the resistance of young children and adolescents, to avoid going to crowded public places, to pay attention to personal hygiene, to wash hands before and after meals, and to keep indoor air circulation during the high season of infection.