Welcome to MedlinePlus
MedlinePlus is an online health information resource for patients and their families and friends. It is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). Learn more about MedlinePlus
- FEATURED TOPIC
- Sexually Transmitted Diseases
- Sexually transmitted diseases (STDs) are passed from person to person during sexual contact. Testing, vaccines, and prevention behaviors can lower your risk.
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