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16 Data on masks and COVID-19 rate of infection 关于口罩与新冠传染率的数据



English Transcript (在下方阅读中文视频全文)

DAVID: Thank you for being with us today Dr. Lio. For our first question we received this infographic that shows how wearing a mask can reduce the rate of COVID transmission. Could you comment on these numbers and how much wearing a mask actually reduces COVID transmission?


DR. LIO: Thanks for having me David. I’ve seen this infographic before, but I haven’t seen any data behind it. I haven’t heard of any research studies published looking at specifically the rate of transmission of COVID and mask-wearing that have been vetted properly. There probably have been studies in the past looking at different types of viruses. As far as I know, the graphic conceptually is true: if you both are wearing masks, that will help to prevent infection. As far as the actual numbers, we don’t know. We don’t have that data. We do know that by wearing just the mask by itself, it’s not going to help much. You need to combine that with social distancing, so keeping at least 6 ft apart from other people when possible, and it also needs to be combined with hand-washing. You can imagine, if you’re just wearing a mask but you’re touching the mask and touching other things, you can still get the virus on yourself. Especially if you touch your face afterwards, that doesn’t help at all.


DR. LIO: We do know that there is a substantial portion of people who catch the virus without ever having symptoms themselves. That is why it is important to have this policy of everyone wearing masks whether or not they feel sick or not. Because the mask does a pretty good job preventing you from spreading droplets to other people. It doesn’t do as good of a job protecting your face from other people’s droplets, but if everyone wears a mask, they can at least protect other people from their own droplets.



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大卫:感谢刘医生参与我们的问答!我们的第一个问题来自问答群中收到的一张图片,上面写着关于佩戴面罩能够如何降低新冠传播的一些数字。您能评论一下图片上的数据吗?戴口罩究竟能对新冠的传播降低多少?


刘医生:谢谢大卫!我之前也看到过这个图片,但是我没有见过这些信息背后的任何数据。我还未曾听说任何经过审查的,专门研究口罩与新冠病毒传播率的研究报告。过去可能有研究观察其他类型的病毒。据我所知,这个图片在概念上是正确的——如果大家都戴着口罩,那将有助于预防感染,但就实际数字而言,我们无从知晓。我们知道,仅仅戴上口罩对病毒的防范不会有太大帮助。你需要将它与保持社交距离结合起来,尽量与其他人保持至少6英尺的距离。也要将戴口罩和洗手结合起来。


刘医生:因为你可以想象,如果你戴着口罩,但你的手摸了口罩,再摸其他的东西,尤其你的脸,那么你仍然可以接触到病毒。这样,戴了口罩那根本没有作用。


刘医生:我们知道,有相当一部分人感染了新冠的情况但完全没有症状。这就是为什么要求人人戴口罩这一政策非常重要。无论你是否感觉不适,都应该戴口罩。因为面罩虽然可以很好地防止将你的飞沫传播给其他人,但并不能很好的保护你的脸不受到别人飞沫的影响。但是,如果每个人都戴着口罩,至少可以保护别人不受自己飞沫的影响。




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