Increase in early syphilis cases in the young heterosexual population of Reunion Island: surveillance data, 2010-2018.

Since the early 2000s, the number of syphilis cases in France has been growing, affecting mainly men who have sex with men (MSM). In Reunion Island, a French department located in the Indian Ocean, a resurgence of the disease has been observed since 2006 and cases of congenital syphilis have been reported since 2008.