用英语回答这五个问题！谢谢！
AIDS is short for Acquired Immune Deficiency Syndrome, while HIV means Human immunodeficiency virus
Following initial infection, a person may experience a brief period of influenza-like illness. This is typically followed by a prolonged period without symptoms. As the infection progresses, it interferes more and more with the immune system, making the person much more susceptible to common infections like tuberculosis, as well as opportunistic infections and tumors that do not usually affect people who have working immune systems. The late symptoms of the infection are referred to as AIDS. This stage is often complicated by an infection of the lung known as pneumocystis pneumonia, severe weight loss, a type of cancer known as Kaposi's sarcoma, or other AIDS-defining conditions.
HIV is transmitted primarily via unprotected sexual intercourse (including anal and oral sex), contaminated blood transfusions, hypodermic needles, and from mother to child during pregnancy, delivery, or breastfeeding..
HIV prevention practices may be done by individuals to protect their own health and the health of those in their community, or may be instituted by governments or other organizations as public health policies. Prevention strategies:Pharmaceutical,Social strategies, avoid sex contact.
December 1st every year.
