Việt Nam discovers two new strains of SARS-CoV-2 from imported cases stockbot 0 277 2021.05.20 18:00 http://vietnamnews.vn/society/952234/viet-nam-discovers-two-new-strain… + 13 https://vietnamnews.vn/rss/society.rss + 5 The two new variants are B.1.222 and B.1.619.