COVID-19 travel restrictions and securely share test and vaccine certificates with airlines and governments.Also read: India can’t make up its mind on PSUs, 30 years after liberalisationThat news came shortly after Australian airline Qantas said it would insist in future that international travellers have a COVID-19 vaccination before they fly, describing the move as "a necessity".Taiwan has kept the pandemic well under control thanks to early and effective prevention, and has been very cautious about when it may re-open its borders, which are still largely closed to visitors.Asked whether he thought IATA's COVID "passport" was a good one, Chen said such a thing was "not easy to do", pointing to problems such as certificate verification.