(askmen.com) - Drew Barrymore , Sandra Bullock and Hugh Grant could have Hepatitis A. could have Hepatitis A.The trio may have contracted the illness after attending a US post-premiere party for 'Music and Lyrics' on February 7. The event was catered for by Wolfgang Puck's company, and it has been now been revealed one of the cooks had Hepatitis A. A letter was sent to guests warning them of a "public health issue" and saying they may be at risk of infection if they had eaten uncooked food. Guests at risk were advised to get a gamma globulin shot within 14 days of exposure - before February 21. However, the letter wasn't sent out until March 1. Sponsors of the party claim the Los Angeles County Department of Public Health did not inform them of the problem until February 28th. The letter read: "The Department of Health has reassured the hosts on how very low the risk of infection is." Hosts of the 'Music and Lyrics' party insist no one who attended contracted Hepatitis A. Wolfgang Puck's catering company also catered for a Sports Illustrated bash which was at the centre of a Hepatitis scare. Beyonce Knowles was one of the guests at risk of infection, but was given the all clear.