What is human immunodeficiency virus?What are the main signs and symptoms of human immunodeficiency virus?How is human immunodeficiency virus diagnosed?What are some of the main medical treatments for human immunodeficiency virus?Have any supplements been studied for human immunodeficiency virus?How could diet affect human immunodeficiency virus?Are there any other treatments for human immunodeficiency virus?What causes human immunodeficiency virus?How can human immunodeficiency virus be prevented?