The highly contagious Omicron subvariant BA.2 is now the dominant strain of Covid-19 in the United States, causing an estimated 54.9% of all new Covid-19 infections last week, according to new data from the US Centers for Disease Control and Prevention.
원문출처 : https://www.cnn.com/2022/03/29/health/ba-2-dominant-us/index.html
원문출처 : https://www.cnn.com/2022/03/29/health/ba-2-dominant-us/index.html