Sydney - Australia's international airports began installing thermal-imaging scanners Thursday to try to identify incoming passengers who might have contracted swine flu.
Hundreds have been tested for the deadly H1N1 strain of the virus, but there have been no confirmed cases in Australia.
The captains of aircraft arriving from the Americas are obliged to report to quarantine officers any passengers they suspect of having influenza. Passengers are also obliged to fill in a form detailing their health.