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Sexually Transmitted Infections clinical trials in San Francisco, CA

3 studies for Sexually Transmitted Infections are looking for participants at sites in and around San Francisco (within about 30 miles). Open a study to see who can join and how to contact the study team.

Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →

Doxycycline Prophylaxis for Prevention of Sexually Transmitted Infections

RecruitingPhase 4
  • San Francisco Department of Public Health, San Francisco
Ages 13 to 29 · Women · Updated Oct 16, 2026 · NCT06738407

Combatting HIV Or Other STIs Early (CHOOSE)

RecruitingHealthy volunteers welcome
  • San Francisco Department of Public Health, San Francisco
Ages 13 to 24 · Men · Updated Oct 9, 2026 · NCT07510048

Comparing Mobile Health Strategies to Improve Pre-exposure Prophylaxis Use (PrEP) for HIV Prevention

RecruitingHealthy volunteers welcome
  • San Francisco AIDS Foundation, San Francisco
Ages 15 and older · All sexes · Updated Sep 28, 2022 · NCT04855773

About Sexually Transmitted Infections

Sexually transmitted infections (STIs) are passed from person to person during sexual contact. Testing, vaccines, and prevention behaviors can lower your risk.

More about Sexually Transmitted Infections on MedlinePlus

Sexually Transmitted Infections trials in other cities

Other studies in San Francisco

From ClinicalTrials.gov, data retrieved Nov 15, 2026. Each study sets its own eligibility; the study team decides who can join.