The only way to provide 100% effective protection against STIs through sexual contact is what?

Abstinence is recognized as the only method that provides 100% effective protection against sexually transmitted infections (STIs) during sexual contact. When an individual chooses abstinence, they refrain from all forms of sexual activity, thereby eliminating any risk of STI transmission. This includes vaginal, anal, and oral sex, which are common avenues for the spread of STIs.

While other options, such as contraceptive methods, regular screenings, and safe sexual practices, can significantly reduce the risk of STIs, they do not completely eliminate it. For instance, some contraceptive methods may prevent pregnancy but do not protect against STIs, and while safe sexual practices like using condoms can decrease risk, they are not foolproof. Regular screenings can help in early detection and treatment of STIs, but they do not prevent the transmission of infections during sexual activity.

Therefore, abstinence stands as the only definitive way to ensure that there is no risk of contracting STIs through sexual contact.