 China's economy rapidly grew as a result of Reform and Opening Up policies, and patronage of commercial sex workers, many of whom were injecting drug users, grew among both wealthy businessman and migrant worker populations, bringing HIV back to their hometowns and other cities.Overall, however, the commercial sex industry was not as major a vehicle of transmission as drug injection and blood donation were, and HIV infection rates among female sex workers remained relatively low throughout the 2010s.Estimates from the Chinese Center for Disease Control and Prevention, World Health Organization, and UNAIDS calculated approximately 1.25 million people living with HIV/AIDS in China at the end of 2018, with 135,000 new infections over the previous year.