National HIV Vaccine Awareness Day is celebrated on May 18 to acknowledge all those people who are working towards finding a vaccine for HIV. The day is a reminder about the importance of HIV vaccine research. AIDS is a life-threatening disease that has no cure as yet. National HIV Vaccine Awareness Day is aimed to make sure that people take proper precautions to avoid the spread of HIV. It is also a day to reach out to HIV-positive patients and help them cope with it.