McDonald's Patrons Warned of Hep. A

The operator of a McDonald's in northwestern Illinois says a worker had hepatitis A didn't tell the restaurant until several weeks after the illness was diagnosed. Authorities are trying to figure out why a case of hepatitis A in a McDonald's food handler went unreported for more than three weeks.

An estimated 10,000 people who ate at a McDonald's in Milan are being urged to get preventive treatment for the virus, which can cause fever and abdominal pain.

At least 20 cases of hepatitis A have been confirmed. An infected McDonald's employee came to work on seven days in July, possibly spreading the virus to patrons. And another McDonald's worker was diagnosed June 17, but health officials didn't know about that case until July 13.