The infection is spreading most rapidly among men over 40 years old: the number of cases in this age group increased from 4.7 thousand in 2020 to 9.7 thousand in 2024.
At the same time, the incidence of other sexually transmitted infections, according to official data, has been steadily declining since 2015.
The increase in syphilis cases is observed not only in Russia but also in other countries around the world. Experts point to several factors contributing to this, with the reasons varying by region.
