HELSINKI, July 20 (Xinhua) -- Finland's national carrier Finnair said on Monday that passengers with A/H1N1 flu will not be allowed to board its aircraft.

    Finnair imposed the measure as the new flu was classified as a common dangerous infectious disease by the Finnish National Institute for Health and Welfare.

    According to Finnair, its staff will keep a look out for virus sufferers at check-in desks and when passengers are entering the plane. However, a final decision on a passenger's health will be made by a physician.

    Carriers like British Airways and Virgin Atlantic have introduced similar measures.

    Petri Ruutu, a researcher at the Finnish National Institute for Health and Welfare, questioned the carriers' measures, pointing out that it was difficult to diagnose A/H1N1 flu with any reasonable degree of certainty without laboratory tests.

Special Report:  World Tackles A/H1N1 Flu