Fig. 1

Prevalence of HIV, Syphilis and HCV among Vietnamese FSW in China (2010–2014). The blue solid line represents HIV among all and Vietnamese FSW: The HIV prevalence among all FSW ranged from 1.60 % in 2010 to 0.65 % in 2014; the HIV prevalence among Vietnamese FSW ranged from 8.16 % in 2010 to 1.68 % in 2014. The green dot line represents syphilis among all and Vietnamese FSW: The syphilis prevalence among all FSW ranged from 6.10 % in 2010 to 4.68 % in 2014; the syphilis prevalence among Vietnamese FSW ranged from 8.16 % in 2010 to 3.91 % in 2014. The orange dash line represents HCV among all and Vietnamese FSW: The HCV prevalence among all FSW ranged from 1.00 % in 2010 to 0.73 % in 2014; the HCV prevalence among Vietnamese FSW ranged from 0.00 % in 2010 to 2.23 % in 2014