htlv is a human T-lymphotropic virus that is primarily used for antiviral therapy and symptomatic treatment of diseases associated with viral infection induced by the virus. htlv is an oncogenic RNA virus, a human T-lymphotropic virus infection. htlv is classified as htlv type I and htlv type II. This virus can cause a variety of diseases. htlv type 1 can cause adult T-cell leukemia, lymphoma, and htlv-associated myelopathy. htlv type 2 is associated with megaloblastic leukemia. Treatment is mainly antiviral therapy and chemotherapy for leukemia and lymphoma. htlv is a viral infection, the prognosis is generally poor, need to go to the hospital for active examination and treatment.