Health workers face toughest pandemic battle yet stockbot 0 369 2021.05.22 17:57 http://vietnamnews.vn/society/953584/health-workers-face-toughest-pand… + 9 https://vietnamnews.vn/rss/society.rss + 5 The fourth wave of COVID-19 infections, starting from April 27, is considered the most severe in Việt Nam since the pandemic began.