This study is being conducted to better understand how sexually transmitted infections develop and are detected, and to help improve future testing so people can get faster, more accurate care.

You may be eligible for this study if you meet the following criteria.

Inclusion Criteria:

• Sexually active in the past 3 months
• Interested in sexual health
• Willing to provide biological samples (e.g., urine, swabs, blood) as part of this study
• Ages 18+
• Have had more than one sexual partner in the past 3 months
• Had a sexual partner with an STI in the past 3 months
• Sometimes or never use condoms during sexual activity
• Able to attend a brief study visit at Johns Hopkins Hospital as part of this study

Overall Duration

The study lasts only a short time. Most of your participation happens during one visit, with a few quick steps before and after.

In‑Lab Activities

If you join the study, you will come in for one brief visit. During this visit, a trained staff member will collect a small set of anonymous biological samples. You may also answer a few simple questions about your health or daily habits. No scans or long tests are involved, and nothing will be recorded on video or audio. The visit is designed to be quick, private, and comfortable.

At‑Home Activities

There are no required at‑home tasks for this study. You will not need to complete surveys, use an app, or track anything on your own. All participation happens during the single study visit.

Additional Notes

The study does not provide test results, but the team can help you find free and reliable STI testing in your area if you would like it.

Participants will receive $40 for their time and for providing samples during the study. Transportation support, like bus tokens or a parking voucher, may also be available to help you get to your visit.

There is no cost for you to participate in our research study.