@lagunaqueen @Peejay213 @DrZoeHyde It is irrelevant when these masks are tested to filter 90-99% of particles of the size of a virus and actual respiratory aerosol droplets are much later.
@lagunaqueen @Peejay213 @DrZoeHyde 当这些口罩经过测试以过滤 90-99% 的病毒大小颗粒而实际的呼吸道气溶胶飞沫要晚得多时，这无关紧要。