Apparently a catering employee of world famous chef, Wolfgang Puck, forgot the first rule of restaurant workers: Employees must wash their hands before returning to work.

The employee has been diagnosed with acute Hepatitis A, and the health department has issued an "urgent warning" to all partygoers who have sampled Puck's wares at recent events. According to TMZ, that star studded list includes names like Beyonce, Leo di Caprio's girlfriend Bar Rafaeli, and dozens of Sports Illustrated swimsuit models.

The health department's warning has strongly urged anyone who attended the SI party, or any of the 13 other events catered by Puck between Feb. 1- 20, to get an immune globulin shot by tomorrow to prevent illness.

When contacted, a rep from Puck's catering company would not tell TMZ which other events Puck catered, nor would they reveal how many other people may have been exposed to the illness. They did say, however, that no one who attended Sunday's Governor's Ball at the Academy Awards is at risk.

Labels: Beyonce Knowles, Leonardo DiCaprio, Oscar's