Changing trends of HIV, syphilis, HCV infections and behavioural factors among female sex workers in Chongqing, China: findings from six serial surveillance surveys.

35 However, a previous study using national data reported that from 2008 to 2012, the overall HIV and HCV prevalence among FSWs in mainland China showed a decreasing trend 13 ; the differences may be due to the differences in scope of study area and study period.

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Results The HIV and HCV prevalence among FSWs in Chongqing was stable during the study period, but the prevalence of syphilis had an increasing trend, particularly among low-tier and middle-tier FSWs.

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