Health officials are still searching for a recently arrived Canadian national who was exposed to the influenza A(H1N1) virus, or swine flu, on a flight Sunday from Taiwan's Taoyuan International Airport. "We are now cooperating with the Australian Embassy, which represents Canadian citizens in Cambodia, to search for the Canadian man," Sok Touch, director of the Communicable Diseases Control Department at the Ministry of Health, said Thursday. Officials fear the man may have contracted the virus from an infected 8-year-old Taiwanese child who sat next to him on the flight.