The two biggest developments since the onset of the Covid-19 pandemic occurred within weeks of each other late last year. One was the arrival of effective vaccines. The other was the emergence of virus variants that threaten to defeat them. A global race is now under way between the two. Which comes out on top will determine when — or if — the virus can truly be tamed. And the race will not be properly won unless it is won all around the world.
自新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）疫情爆发以来的两个最大动向在去年底前后脚发生，相隔仅数周。一个是有效疫苗的到来。另一个是可能使疫苗失效的病毒变种的出现。两者正在manbetx app苹果 范围内进行赛跑。哪个取得胜利，将决定新冠病毒何时——或是否——能真正被驯服。而且，除非疫苗在全世界范围内跑赢病毒突变，否则它就不算真正赢了。
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