Here we go again (and again). Another wave of the virus that causes Covid-19 has been spreading across parts of the globe, just as things seemed to be returning to normal in the United States. The perpetrator, called the BA.2 subvariant of the Omicron variant, already accounts for 23% of all US cases, though total cases have not begun to rise nationally.


원문출처 : https://www.cnn.com/2022/03/21/opinions/covid-ba-2-wave-sepkowitz/index.html