PM says reopening of flights, 'vaccine passports' should be studied stockbot 0 493 2021.03.18 00:44 http://vietnamnews.vn/society/906156/pm-says-reopening-of-flights-vacc… + 27 https://vietnamnews.vn/rss/society.rss + 17 Prime Minister Nguyễn Xuân Phúc on Wednesday asked ministries to study reopening international flight routes as well as prepare for the use of 'vaccine passports' and controlled international trade.