Beyonce Knowles was not exposed to hepatitis A at a recent celebrity bash celebrating her appearance on the Sports Illustrated Swimsuit Issue. Officials from the Los Angeles County Department Of Public Health confirmed on Tuesday that guests at the February 14 soiree were potentially at risk.

An employee of celebrity chef Wolfgang Puck, who was working at the party, has been diagnosed with the disease.

Guests were advised by health officials to seek immediate medical treatment and get an immune globulin shot to prevent illness.

A representative for Knowles confirms to US entertainment show Extra that the Irreplaceable singer is not at risk because she did not eat any food at the party.