What Are the New COVID Variants? 새로운 코로나 변종은 무엇입니까?
What Are the New COVID Variants? 새로운 코로나 변종은 무엇입니까? Many variants of COVID-19 have been discovered. There are currently four that the CDC classifies as “variants of concerns.” Alpha (B.1.1.7) – First identified in the United Kingdom in late 2020, … Continued