Of all STIs, how many are condoms effective against?
First, keep in mind that condoms are not 100% effective in preventing the transmission of any sexually transmitted infection (STI). The only 100% safe choice is abstinence. That said, when used consistently and correctly, condoms are highly effective in preventing the sexual transmission of HIV. In addition, when used consistently and correctly, condoms can reduce the risk of transmission of Chlamydia, gonorrhea, and trichomoniasis. Correct and consistent use of latex condoms can reduce the risk of genital herpes and syphilis only when the infected area or site of potential exposure is protected/covered by the condom. The effect of condoms in preventing HPV infection is unknown. STIs like genital herpes, HPV, and syphilis can manifest themselves on areas not protected/covered by a condom, so open communication with your partner about risk and sexual history is critical. Since many STIs show no symptoms in those infected, getting tested is extremely important.