So far the virus has appeared only in parts of eastern China surrounding Shanghai, where the first human infection was publicly identified Sunday.

WSJ: China Kills Market Birds as Avian Flu Deaths Rise

Within the past week, publicity associated with bird flu in Shanghai and surrounding areas has had a negative impact on KFC sales, the company said.

FORBES: China's Bird Flu A Problem For Yum! Brands, Co Says

All of the five new cases are in Shanghai and the surrounding region, where most of the other cases have been located.

CNN: WHO reports 5 new bird flu cases in China; total now 49