Israeli Eitan
Zabludovicz Center for Autoimmune Diseases, Sheba Medical Center, Tel Hashomer.
Harefuah. 2020 Jun;159(6):391-393.
SARS-CoV-2 is dispersed from patients by talking, coughing and sneezing. The generated micro-droplets aerosols can travel up to 8 meters, stay suspended for long periods and preserve viral infectivity for a median of 2.7 hours. An unprotected person exposed to this cloud, might inhale a considerable amount of infectious viral doses, which will attach to the ACE 2 receptors on alveoli epithelium, resulting in infection. N95 respirators and surgical masks block 95% and 50-60% respectively of inhalable particles and protect the wearer from infection. Surgical masks and N95 without exhalation valve, protect both the wearer and the environment from carriers and sick people.
严重急性呼吸综合征冠状病毒2（SARS-CoV-2）通过说话、咳嗽和打喷嚏从患者身上传播。产生的微滴气溶胶可传播达8米，长时间悬浮，并在中位数为2.7小时内保持病毒传染性。暴露于这种气溶胶云的未受保护者可能吸入大量具有传染性的病毒剂量，这些病毒将附着在肺泡上皮细胞的血管紧张素转换酶2（ACE 2）受体上，从而导致感染。N95呼吸器和外科口罩分别可阻挡95%和50-60%的可吸入颗粒，并保护佩戴者免受感染。没有呼气阀的外科口罩和N95口罩，可保护佩戴者和环境免受携带者和病人的影响。
