MedlinePlus 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). It was built as an online health information resource for patients and their families and friends.
MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.
MedlinePlus at a Glance
- Offers information on health topics, human genetics, medical tests, medications, dietary supplements, and healthy recipes.
- Sourced from more than 1,600 selected organizations.
- Provides 40,000 links to authoritative health information in English and 18,000 links to information in Spanish.
- In 2018, 277 million users viewed MedlinePlus more than 700 million times.
COVID-19 Testing
COVID-19 (coronavirus disease 2019) is a disease caused by a virus called SARS-CoV-2. There are two types of tests for this virus:
- A viral test tells you if you have a current infection. Viral tests can either be rapid tests or laboratory tests:
- Rapid tests can be done in minutes. They are often antigen tests, which look for specific proteins from the virus. Some rapid tests are self-tests which you can do at home.
- Laboratory tests can take days to complete and include PCR tests.
- An antibody (serology) test might tell you if you had a past infection.
If you need a COVID-19 test, you can:
- Buy a self-test online or at a store. Make sure that the test you buy has been authorized by the U.S. Food and Drug Administration (FDA).
- Check your state or local health department's website for information on testing in your area.
- Contact your health care provider.
Even if your COVID-19 viral test is negative (the test did not detect the virus), you should still take steps to protect yourself and others.
Centers for Disease Control and Prevention
