尤其是手术口罩,防不了coronavirus的,不要再浪费钱了。 Surgical masks: While they do protect from large respiratory droplets (a spray from a sneeze or mucus from a cough), they don't prevent against airborne droplets. Surgical masks aren't considered respiratory protection by the CDC because they don't filter smaller particles, and therefore isn't effective in totally preventing coronavirus transmission. PuppyJohn 发表于 1/28/2020 1:03:00 PM
轻幽默一下
疑似的已经上百例了
你是在华人上我见到的唯一一个说的真正靠谱的。
RE. AND 同意
对啊,医院都提供免费口罩的,我看白人去看病,现在这个时候,也不少戴口罩的啊,生病的怕传给别人,没病的怕被人传染
病毒不是单独飘在空中的,是借助飞沫,飞沫直径远远大于口罩网孔。