A new and slightly changed version of the Delta coronavirus variant is spreading in a number of countries including the United Kingdom, United States and India, health officials say.
원문출처 : https://www.cnn.com/2021/06/25/health/delta-plus-variant-explainer-intl-hnk-scn/index.html
원문출처 : https://www.cnn.com/2021/06/25/health/delta-plus-variant-explainer-intl-hnk-scn/index.html