Human immunodeficiency virus, or HIV, is the virus that causes AIDS. HIV/AIDS weakens a person’s ability to fight infections and cancer. HIV transmission can occur with unprotected sex or with needle sharing. Symptoms of HIV vary widely. A person may have HIV symptoms or AIDS symptoms without knowing it until they get HIV testing. There is no HIV cure at this time although medications can delay the onset of AIDS. Shanghai HIV and AIDS is one of the main section of the Sexual Health Shanghai and will provide you most lastest and relevant information about HIV and AIDS in Shanghai China.