Global concern over rise of highly contagious Delta variant as cases i… stocking 0 29 2021.06.21 23:02 https://youtu.be/MDzcJaq2XBg + 2 감염력 높은 델타 변이... 방역의 가장 큰 골칫거리 되어가는 중 The highly infectious Delta variant of Covid-19 has been flaring up around the world, most notably in ...