The two countries differ in approaches for working with the highest targeted HIV risk groups. Taiwan focuses on IDUs and MSM, whereas the highest risk group in the Philippines is overseas contract workers and the disease is mostly transmitted through heterosexual contact. Both countries have harm reduction programmes, but Taiwan's is more widespread, given the larger numbers of infected IDUs. Taiwan focuses on pregnant Of the estimated 3 million drug users, roughly 15,000 are IDUs, and up to 77% of IDUs might share needles.