Some old grinch has brought a pre-Christmas gift to the Salt Lake area, but this one won't be very popular. It's the flu.

The first case of Influenza B has been identified in a Salt Lake County adult male. The highly contagious disease is expected to make many more residents miserable during the holidays.State epidemiologist Craig Nichols said this flu is characterized by sudden onset of fever, headaches, fatigue and muscle aches. Sufferers will frequently have chills and a dry, hacking cough.

"Influenza B is predominately a respiratory disease, but children will often complain of severe muscle aches, especially in the legs," Nichols said. "It is not unusual to experience abdominal pain, nausea and vomiting."