The difference, Cook says, is the sheer number of COVID myths and how fast they're spreading.

库克表示，二者的传言的数量相当庞大，传播速度也非常快。

When it spread to the UK, it overtook the fast spreading Alpha variant in a matter of weeks.

当它传播到英国时，它在几周内就超过了快速传播的Alpha变种。

The Canadian government is sending in soldiers to help battle more than 400 fast spreading wildfires raging in the western province of British Columbia.

加拿大政府派遣士兵帮助扑灭在西部不列颠哥伦比亚省肆虐的400多场迅速蔓延的野火。

The covid-19 epidemic is the fastest spreading, most extensive, and most challenging public health emergency China has encountered since the founding of the People's Republic.

这次新冠肺炎疫情，是新中国成立以来我国遭遇的传播速度最快、感染范围最广、防控难度最大的重大突发公共卫生事件。