下次你在咳嗽和打喷嚏的时候,一定要尽量捂住嘴巴和鼻子,因为一声咳嗽可能会喷出两万个病毒,足以让大量的人染病。新加坡医学人员发现,普通的一次咳嗽会产生3000个微小飞沫,每个飞沫直径在1至5微米之间,根据鼻腔分泌物的病毒数量计算,这些飞沫可能含有两 The next time you cough and sneeze, be sure to cover your mouth and nose as much as possible because a cough may spit out 20,000 viruses enough to cause a large number of people to become ill. Singaporean medical staff found that a common cough will produce 3000 tiny droplets, each droplets diameter between 1 to 5 microns, according to the number of nasal secretions virus, these droplets may contain two