Google launched a new enhanced version of Google Health that aid users of screen readers and self-voicing browsers. These enhancements are implemented using W3C ARIA, an emerging set of Web standards that make AJAX applications work smoothly with screen readers. You can now easily navigate Google Health to not only manage health records; Google Health enables me to quickly research various relevant health conditions, track medications and do a myriad health-related tasks.

More info: Google Web Toolkit Blog