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Prevalence of HIV, syphilis, and hepatitis C over time for FSWs and their clients taken from serial surveys, Guangix, China, 2010–2015. FSWs were categorized according to the sex work venues where they solicit their clients. Clients were categorized as middle age (40–49 years) and older clients (≥50 years). Data on HCV prevalence was only available for clients of FSWs from 2013–2015. FSWs = female sex workers, HCV = hepatitis C virus.
