Not 100% Effective!
“Condoms are the only birth control that reduces your risk of both pregnancy and STDs, including HIV… It’s important to know, however, that they cannot completely protect you and your partner from some STDs, like herpes, syphilis, or human papillomavirus (HPV), the virus that causes genital warts and cervical cancer. Also, condoms can break, slip, or leak, especially if they are not put on and taken off properly. The only sure way to prevent pregnancy and STDs is NOT to have sex.” – CDC.gov