While in Cambodia and Thailand the epidemic is slowing down, this is not yet the case with Indonesia and Viet Nam. More and more, however, new cases of infections are women who have acquired HIV from unsafe sex with their stable partners. In Thailand, this group accounted for more than 4 in 10 (or 43 per cent) of new infections in 2005 (UNAIDS and WHO, 2008, p. 16).