Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Library of Medicine

Espa?ol

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

HIV

FEATURED TOPIC: HIV
HIV (human immunodeficiency virus) attacks the body’s immune system. There is no cure but it can be treated with medicines. To know if you have HIV, get tested.: Learn more

Health Topics Find information on health, wellness, disorders and conditions

Medical Encyclopedia Articles and images for diseases, symptoms, tests, treatments

Genetics Explore genetic conditions, genes, and how genetic variations affect health

Drugs & Supplements Prescription drugs, over-the-counter medicines, herbs, and supplements

Medical Tests Learn why your doctor orders medical tests and what the results may mean

Healthy Recipes These recipes show you how to prepare tasty, quick meals as part of a healthy lifestyle

Easy-to-Read Health Information

Health Information in Multiple Languages

MedlinePlus Connect for EHRs

NIH MedlinePlus Magazine

Clinical Trials