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What is the purpose of this Web site? is CDC's primary online communication channel. Annually, there are close to 500 million page views to the site, averaging 41 million page views per month. provides users with credible, reliable health information on:

  • Data and Statistics
  • Diseases and Conditions
  • Emergencies and Disasters
  • Environmental Health
  • Healthy Living
  • Injury, Violence and Safety
  • Life Stages and Populations
  • Travelers' Health
  • Workplace Safety and Health
  • And more…

Who is this Web site designed for? provides health and safety information to:

  • Individuals interested in health issues
  • Public Health Professionals
  • Healthcare Providers
  • Researchers and Scientists
  • Partners
  • Policy Makers
  • Media
  • Businesses
  • Students and Educators

How can I link to

Follow the instructions on our linking policies page and get link to our language and graphical images.

How do I find other facts about

CDC has made the following documents available for more detailed information about

How do I contact

We are continually expanding and improving this site. If you have additions or comments, please email us.


What are the technical requirements for this Web site?

The site has been tested to display and function similarly on the following browsers:

  • Windows: Internet Explorer 6.0+, Opera 10.0+, Firefox 3.6+, Chrome 10+, Safari 4.0.5+
  • Mac OS X: Firefox 5.0+, Safari 5.0+, Chrome 11+
  • Linux: Firefox 5+, Konqueror

JavaScript must also be enabled to utilize certain features of the site. For guidance on how to enable JavaScript in your browser, view these instructions.

A plug-in is software that is added to a Web browser and allows you to access additional features or services. If you don't have the appropriate plug-in, you must download and install the plug-in.

In some sections of, you will need a plug-in to open and view a specific file format such as an Adobe Acrobat® PDF, Microsoft Word document, or Microsoft PowerPoint presentation. Plug-ins and viewer software for file formats commonly used on our site are available here: How to View File Formats on

Adobe Acrobat : In some sections of, you will need the FREE Adobe® Acrobat® Reader plug-in. The Acrobat plug-in allows you to print forms or documents exactly as created.

Adobe Flash: You may also need the FREE Adobe Flash Player. This plug-in allows you to see much of the interactive content on our site.

Contact Us:
  • Page last reviewed: December 5, 2011
  • Page last updated: December 5, 2011 The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC-INFO