New, more contagious variants of the novel coronavirus can spread easier, making some activities we thought were low risk, higher risk.
원문출처 : https://www.cnn.com/videos/health/2021/02/18/covid-variants-low-high-risk-activities-orig-mg.cnn
원문출처 : https://www.cnn.com/videos/health/2021/02/18/covid-variants-low-high-risk-activities-orig-mg.cnn