On May 21, 2008, President Bush signed the Genetic Information Nondiscrimination Act (H.R. 493) into law. The bill prohibits employers from discriminating against employees on the basis of genetic information in hiring, firing, and other activities. It also prohibits health insurers from discriminating against individuals on the basis of genetic information and is intended to encourage individuals who might otherwise fear genetic discrimination to seek potentially beneficial genetic testing.

The Senate unanimously passed the bill on April 24 and the House of Representatives followed suit on May 1 by a vote of 414-1.