Which of the following makes Covid-19 a once-in-a-century pandemic?

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Which of the following makes Covid-19 a once-in-a-century pandemic?

A.It has a higher fatality rate than any other recorded influenza pandemic.

B.It kills not only adults but also children.

C.It can transmit at an exponential rate.

D.The health systems are stretched thin in LMICs.

参考答案:

答案:It can transmit at an exponential rate.