Prostitution in Thailand is not itself illegal, but public solicitation for prostitution is prohibited if it is carried out "openly and shamelessly" or "causes nuisance to the public".[1][2] Due to police corruption and an economic reliance on prostitution dating back to the Vietnam War, it remains a significant presence in the country.[3][4] It results from poverty, low levels of education and a lack of employment in rural areas. Prostitutes mostly come from the northeastern (Isan) region of Thailand, from ethnic minorities or from neighbouring countries, especially Cambodia, Myanmar, and Laos.[5][6] In 2019, the Joint United Nations Programme on HIV/AIDS (UNAIDS) estimated the total population of sex workers in Thailand to be 43,000.[7]