We are committed to providing access to our Web pages for all individuals, including those with disabilities.

In all our online offerings at the National Museum of American History, we strive to make appropriate use of technology while keeping the information accessible to a wide number of visitors. However, many factors can influence the quality of the experience, including equipment limitations, browser behavior, and user default settings. While we make every effort to anticipate these problems, users may find it necessary to make adjustments to settings or software in order to see the intended result.

The Whatever Happened to Polio? Web site has been designed to be compatible with a variety of Web browsers and operating systems. The site works best with industry-standard screen readers IBM Home Page Reader and JAWS. Multimedia features on the site require Macromedia Flash Player 6 or higher.

Technical questions relating to this Web site may be directed to our contact form.

Standards Compliance
This site complies with all priority 1 checkpoints of the W3C Web Content Accessibility Guidelines (WCAG) 1.0 and follows United States Federal Government Section 508 Internet and Intranet Accessibilty Standards. Our best efforts have been made to satisfy the majority of the WCAG 1.0 priority 2 and 3 checkpoints.

Text Size
You can easily change the size of the text on the page by selecting the “small text” and “large text” links in the top navigation of the page.

Flash Alternatives
For those visitors who choose not to use the Flash plug-in, a text version of Flash interactives or animations is provided.

Video Captioning
All video provided on the site is captioned for the hearing impaired.

Audio Options
All audio provided on the site is accompanied by a text transcript.

Images
All content images used on the site include descriptive ALT attributes. Purely decorative graphics include null ALT attributes.

Use of Cascading Style Sheets (CSS)
As recommended by the WCAG 1.0, style sheets are used to format text and control layout where possible while maintaining consistency of the site throughout a variety of browsers and platforms.

Links
All links can be followed in any browser, even if JavaScript is turned off. There are no links that open new windows without warning.

Navigation and Access Keys
Most browsers support jumping to specific links by typing keys defined on the Web site. On Windows, you can press ALT + an access key; on Macintosh, you can press Control + an access key.

Access key 2 has been defined to allow users to skip directly to the main content.