在秋冬季节,着凉感冒是常有的事,所以每个人都可能咳嗽和打喷嚏,但是不要对着别人或在人群中咳嗽、打喷嚏,那样既不卫生,也不文明。人们感冒时,细菌和病毒会随着说话、咳嗽、打喷嚏时的唾沫星子排到空气中。唾沫星子有大有小,小的直径只有2～8微米,不仅可以飞得很远,而且能在空中长时间飘浮,所以叫飞沫。飞沫是呼 It is not uncommon for cold and cold to catch cold and cold in autumn and winter, so everyone may cough and sneeze, but do not cough or sneeze at others or in the crowd. It is neither hygienic nor civilized. When people catch a cold, bacteria and viruses can be released into the air as they speak, cough, and sneeze. Spit stars are big and small, small diameter of only 2 to 8 microns, not only can fly very far, but also in the air for a long time floating, so called droplets. Drop is call