Varilrix is intended for the active immunization against varicella of the categories of persons listed below, where there is no history of varicella.- Healthy subjects, from the age of 12 months.- Patients at high risk of severe varicella, such as patients with acute leukemia or a chronic condition, those on immunosuppressive therapy or those for whom an organ transplant is being considered.Healthy persons living in close contact with patients with varicella and high-risk patients.