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本帖最后由 boysp 于 2022-1-7 00:49 编辑
美国疾病控制与预防中心CDC:
研究表明,sars-cov-2的粒径约为0.1微米(µm)。然而,病毒通常不会单独通过空气传播。这些病毒颗粒由病人呼出时,是包裹在比单个病毒还要大的呼吸道液滴中。在说话、唱歌、呼吸和咳嗽时呼出的大部分呼吸道颗粒大都小于5微米。
Research shows that the particle size of SARS-CoV-2 is around 0.1 micrometer (µm). However, the virus generally does not travel through the air by itself. These viral particles are human-generated, so the virus is trapped in respiratory droplets and droplet nuclei (dried respiratory droplets) that are larger than an individual virus. Most of the respiratory droplets and particles exhaled during talking, singing, breathing, and coughing are less than 5 µm in size.
https://www.cdc.gov/coronavirus/ ... ty/ventilation.html
美国CDC指出,COVID-19主要通过三种方式传播:
当靠近呼出含有病毒小飞沫和颗粒的感染者时吸入空气。
含有病毒的小飞沫和颗粒落在眼睛和口鼻上,尤其是通过诸如咳嗽或打喷嚏的喷溅和喷射。
用带有病毒的手触摸眼睛或口鼻。
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