An Australian epidemiologist is calling for the federal government to have international arrivals tested for the CCP virus before leaving the airport. Mary-Louise McLaws, an epidemiologist professor at the University of New South Wales (UNSW), doesn’t think testing less than three days before boarding is enough, which has already been required for travellers entering Australia. “They often have it several days before they hop on the plane,” she told the Nine Network on Wednesday. “Anything can happen between that three-day period of having the PCR (test). They may have to transit. They may, of course, inadvertently acquire it there. It’s just an additive bundle of prevention.” The call comes at the time when New South Wales (NSW), the most populous Australian state, announced new rules for international arrivals on Tuesday. Travellers must have a COVID-19 nose and throat PCR test within 24 hours of arriving in NSW and have another …