The frequent criticism of these statistics is that it's mostly gay people but the highest increase has been in pregnant women.

CDC data shows a surge of sexually transmitted infections in the U.S. in recent years. The most significant rise is in syphilis and congenital syphilis, which occurs when mothers pass on the infection to their babies during pregnancy.

https://www.pbs.org/newshour/show/u-s-sees-concerning-rise-in-stis-congenital-syphilis-with-no-signs-of-slowing#:~:text=New%20CDC%20data%20shows%20a,Dr.