Background: \- KSHV inflammatory cytokine syndrome (KICS) is a newly recognized disease caused by Kaposi sarcoma-associated herpesvirus (KSHV). This virus can cause cancer. People with KICS can have severe symptoms. They include fever, weight loss, and fluid in the legs or abdomen. People with KICS may also be at risk of getting other cancers associated with KSHV. These cancers include Kaposi sarcoma and lymp...

Summary: The goal of this clinical study is to provide continued access to the study drug(s) to children and adolescents with human immunodeficiency virus type 1 (HIV-1) who completed their participation in an applicable parent study and to monitor for adverse events. The primary objectives of this study are as follows: * To provide continued access to the study drug received in the parent protocol or swit...

Background: Lymphoma is a type of blood cancer. Blood cell transplant can cure some people with lymphoma. Researchers want to see if they can limit the complications transplant can cause.