Since its discovery six months ago, Omicron has been producing subvariants faster than scientists can name them. How quickly are these new strains transmitted? What does the emergence of new subvariants mean to our fight against the pandemic? Watch this video.
自六个月前发现该病毒以来，Omicron 产生子变体的速度比科学家们命名它们的速度还要快。这些新菌株的传播速度有多快？新子变量的出现对我们抗击疫情意味着什么？看这个视频。
