Primary and Secondary Syphilis — Reported Cases by Sex and Sex of Sex Partners, United States, 2016–2020 

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Ribbon plot showing reported cases of primary and secondary syphilis by sex and sex of sex partners during 2016 to 2020.

ACRONYMS: MSM = Gay, bisexual, and other men who have sex with men; MSU = Men with unknown sex of sex partners; MSW = Men who have sex with women only
NOTE: Over the five-year period, 0.2% of cases were missing sex and were not included.

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Page last reviewed: April 12, 2022
Content source: Division of STD Prevention, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention