Mainland China has confirmed its third case of swine flu and its first in the capital, Beijing, the same day it released 282 people from quarantine with a clean bill of health.
The Beijing case is an 18-year-old female who has been studying in New York state.
The first two cases in mainland China are Chinese nationals who had been studying in the United States and Canada.
Hong Kong, a special administrative region of China, has confirmed two cases.
Turkey and India have confirmed their first cases of H1N1 flu, all involving airline passengers arriving from the United States.
Meanwhile, health officials in Japan have identified the first domestic case of the disease in a 17-year-old student in the western port city of Kobe.
Two others are thought to be infected. None had been overseas recently.
Thirty-eight countries have now confirmed cases of the flu strain.