HIV is the human immunodeficiency virus, or HIV as it is commonly known, and after infection, one can develop acquired immunodeficiency syndrome, or AIDS. There are three ways of HIV transmission, blood transmission, sexual transmission and vertical transmission from mother to child, so if you have any of the above risk factors and have symptoms such as fever, weakness and swollen lymph nodes, it is recommended to go to the hospital for HIV testing. which in turn causes various opportunistic infections tumors.