India and Turkey have recorded their first cases of swine flu, giving further evidence that the disease is spreading.
In both countries the H1N1 virus was detected following the screening of passengers arriving at airports.
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.
Some 39 countries have reported 8,453 cases of the virus, a rise of nearly 1,000 in 24 hours.
At least 72 people have died of the virus, the World Health Organization says.
In the past week the number of people infected by the virus has risen sharply with the US, followed by Mexico, where the epidemic began, recording the highest number of cases.