Abstract
Varicella is a common viral infection in childhood and usually has a benign evolution. However, the evolution can be severe in immunosuppressed children. Vaccination can prevent its occurrence and especially the development of severe and/or complicated cases. Methotrexate is a systemic therapeutic option for many inflammatory diseases, and its immunosuppressive action exposes its users to a higher susceptibility to infection. The present report describes a case of severe varicella infection in a child immunosuppressed with methotrexate.