Asia’s planned travel bubbles burst by Delta variant as some governments cling to ‘zero Covid’ strategy

Fresh lockdowns and restrictions in Asia brought on by the faster-spreading Delta coronavirus variant are making the region’s pursuit of travel bubbles look like an increasingly fruitless endeavour.Air travel bubbles, corridors that allow movement between countries without the need for quarantine, have largely been a letdown as nations pull up the drawbridge again to contain outbreaks. A travel link between Singapore and Hong Kong, first mooted last year, has never actually opened. Meanwhile,…