I'm from China,In my past sexual history, i used a condom every time for insert,had no protect for oral sex,but i do not know what reason, I was infected with syphilis.I would like to ask the question is:
1、Protection of the insert for syphilis is absolutely safe??
2、Oral sex can spread of syphilis ?(If syphilis sore in prostitute's mouth)
3、Skin contact with syphilis sore can infect?