The infection progresses through four distinct stages if left untreated: Syphilis - StatPearls - NCBI Bookshelf
: Newborn cases (congenital syphilis) increased over 10 times from 2012 to 2022. sifelis.zip
: Men who have sex with men (MSM) and young adults (ages 20–35) remain the most affected populations. Stages and Symptoms The infection progresses through four distinct stages if