Australia announced Monday it will open its borders to vaccinated international tourists after almost two years. Double-vaccinated tourists and all remaining visa holders will be allowed into Australia from February 21, Prime Minister Scott Morrison told reporters in Canberra. The country closed its border to all but citizens and permanent residents, with few exceptions, in March 2020. A staggered border reopening started last year, with international students, working visa holders and backpackers welcomed back in stages. “You must be double vaccinated to come to Australia,” Morrison said. “Th…