Can You Get STDs If Both Partners Are Disease-Free? - Urology

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If both partners are confirmed to be free of sexually transmitted infections (STIs), is there still a risk of transmission?


Doctor, if my girlfriend and I are both certain that we do not have any sexually transmitted infections (STIs), have not been unfaithful, and had unprotected sex for the first time six months ago, is it still possible for us to contract STIs? If both of us are confirmed to be free of STIs, does that mean we won't transmit anything unless there is a source of infection in the environment?

Xiao Lan, 20~29 year old female. Ask Date: 2018/01/11

Dr. Du Shixi reply Urology


Hello: If both individuals do not have sexually transmitted infections and have not been unfaithful, then there would naturally be no sexually transmitted infections.
The environmental sources of infection are rare, and I've only heard of genital warts (but even those are quite uncommon).
Wishing you good health.

Reply Date: 2018/01/11

More Info


When considering the question of whether you can get sexually transmitted diseases (STDs) if both partners are confirmed to be disease-free, it's essential to understand a few key points about STDs, testing, and the nature of sexual health.

Firstly, if both you and your partner have been tested and confirmed to be free of STDs, the risk of transmission during sexual activity is significantly reduced. However, it's important to note that no testing is 100% foolproof. There are several factors to consider:
1. Window Periods: Many STDs have a "window period," which is the time after exposure during which the infection may not be detectable by standard tests. For instance, HIV can take up to three months to show up in tests, while other infections like gonorrhea or chlamydia may be detectable sooner. If either partner was recently exposed to an STD but tested negative, they could still be in the window period.

2. Asymptomatic Carriers: Some individuals may carry STDs without showing any symptoms. For example, herpes (HSV) can be asymptomatic, meaning a person can transmit the virus without knowing they have it. Regular testing is crucial, even for those who feel healthy.

3. Mutual Monogamy: If both partners are in a mutually monogamous relationship and have been tested, the risk of contracting STDs is low. However, it is still advisable to continue regular health check-ups and communicate openly about sexual health.

4. Other Infections: While STDs are often the primary concern, there are other infections that can be transmitted through sexual activity, such as bacterial vaginosis or yeast infections, which are not classified as STDs but can still affect sexual health.

5. Environmental Factors: As you mentioned, the presence of pathogens in the environment can also pose a risk. For instance, if one partner has an infection that is not sexually transmitted but can be passed through skin-to-skin contact or other means, there could still be a risk of transmission.

6. Safe Practices: Even in a situation where both partners are confirmed disease-free, practicing safe sex, such as using condoms, can provide an additional layer of protection against STDs and unintended pregnancies. Condoms are effective in reducing the risk of many STDs, including HIV, gonorrhea, and chlamydia.

In conclusion, while the risk of contracting STDs is significantly lower when both partners are confirmed to be disease-free, it is not entirely eliminated. Regular testing, open communication about sexual health, and practicing safe sex are essential components of maintaining sexual health. If you have any concerns or questions about your sexual health or testing, it is always best to consult with a healthcare professional who can provide personalized advice and guidance.

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