@Peejay213 @DrZoeHyde Measurement removing 70% of aerosol particles with cheap cloth masks. PFE certification on surgical masks, usually 90%+ is measured at 0.1 microns, about the size of a virus. Actual aerosol particles carrying viruses are much larger.
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@Peejay213 @DrZoeHyde 测量用廉价的布口罩去除 70% 的气溶胶颗粒。外科口罩的 PFE 认证，通常 90% 是在 0.1 微米测量的，大约是病毒的大小。携带病毒的实际气溶胶颗粒要大得多。
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