World AIDS Day, observed on December 1 since 1988, aims to raise awareness of the AIDS pandemic caused by HIV and mourn those lost to the disease. With over 36 million deaths since 1981 and millions still living with HIV, AIDS remains a significant global public health issue, particularly in regions like sub-Saharan Africa and parts of Asia. The day promotes education on prevention, the importance of safe sex, and highlights ongoing challenges in treatment and the need for effective health education.