The document defines key terms related to HIV/AIDS such as HIV, AIDS, the difference between HIV and AIDS, and sexually transmitted infections (STIs). It then provides a short history of HIV/AIDS in the Philippines and discusses modes of HIV transmission including unprotected sex, infected blood, and mother-to-child transmission. It explains principles of HIV transmission and how to avoid infection through abstinence, monogamy, condom use, and avoiding drug use. The importance of testing is discussed. Finally, it summarizes Republic Act 8504 or the Philippine AIDS Prevention and Control Act of 1998 which established policies for HIV prevention and protection of confidentiality.