U.S. Department of Health & Human Services Explore HHS Close
Sort by


Medical Information

Vaccines.gov offers health information for your general knowledge. This information does not replace written law or professional medical advice, diagnosis, or treatment. It is intended to be a general summary for public use. If you have questions about a medical condition, always seek the advice of a doctor or other qualified health professional.

Links and Ads

Our website links to federal agencies and, in some cases, to private organizations. You are subject to external sites’ privacy policies when you leave our site.

Reference in this website to any specific commercial product, process, service, manufacturer, or company is not an endorsement or recommendation by the U.S. Government or the U.S. Department of Health and Human Services (HHS). Vaccines.gov is not responsible for the contents of other websites.

When visiting our website, your browser may also produce pop-up advertisements. These advertisements were most likely produced by other websites you visited or third-party software on your computer. HHS does not endorse or recommend products or services for which you may see a pop-up advertisement while visiting our site.

Information Security

This site is maintained by the U.S. Government and is protected by various provisions of Title 18, U.S. Code. Violations of Title 18 are subject to criminal prosecution in federal court.

To keep our site secure and to ensure that this service remains available to all users, we use software programs to monitor traffic and identify unauthorized attempts to upload or change information, or otherwise cause damage. In the event of authorized law enforcement investigations, and in accordance with any required legal process, information from these sources may be used to help identify an individual.

Last Reviewed: July 2018