HIV/AIDS has not yet caused a widespread epidemic in the Philippines. Rates in all the usual risk groups (sex workers, men who have sex with men, STD clients, returning overseas workers, etc.) have remained below 1%, except in a few areas, where they are still only 1-2% in some risk groups. The low level of HIV may be due in part to the low number of sex worker clients per night, the relatively low number of full-time sex workers, the low proportion of injectors among drug users, the early multisectoral response to the epidemic, and the presence of social hygiene clinics for sex workers. The incidence of STDs, multiple partners, and injection drug use with needle sharing, however, is increasing, suggesting that an explosive epidemic could occur if the virus is introduced into the appropriate risk groups. The Philippine government has confronted the problem of HIV/AIDS aggressively with an action plan that includes an emphasis on the response of the local government agencies, involvement and support of nongovernmental organizations (NGOs), incorporation of HIV/AIDS education into the school curriculum, and laws forbidding discrimination against persons with HIV/AIDS or belonging to risk groups. Local and international NGOs have been actively involved in prevention of HIV/AIDS and support of affected individuals. Although the Philippines is currently experiencing low rates of HIV/AIDS, the country needs to be prepared for the possibility of an explosive increase in the spread of HIV/AIDS. Vietnam and Indonesia provide examples of delayed epidemics of HIV/AIDS that could also occur in the Philippines.