Eighteen US soldiers who tested positive for swine flu were removed from a military base in Kuwait on Sunday, as Australia shut down a school after identifying two more cases of the disease.
Several countries, many in Asia, announced fresh cases of A(H1N1) influenza, including China where a 21-month-old baby was being treated in hospital, and in Switzerland a woman returning from the United States became the country's third flu victim.
"All the 18 soldiers have left Kuwait," the deputy chief of Kuwait's public health department, Yussef Mendkar, told AFP.
"They had normal symptoms of the disease and were given the necessary medication."
Mendkar said the US soldiers had "had no contact whatsoever with the local population," and that the oil-rich state remained free of the A(H1N1) influenza.
Earlier, Kuwait's Undersecretary of Health Ibrahim al-Abdulhadi told the official KUNA news agency that the soldiers had been immediately isolated at the US base in Arifjan, 70 kilometres (about 40 miles) south of the capital.
The US embassy in Kuwait said it was aware of the cases.
Arab countries in the Gulf region, which have millions of foreign workers, have so far not reported any confirmed cases of the flu.
But authorities in the region have stepped up surveillance of travellers at airports, with Doha, Dubai and Abu Dhabi installing thermal cameras.
Asian countries were the centre of most of the fresh cases of the infection Sunday.