答:普通口罩的效果不佳,勤洗手才是正道。气温反复无常,在感冒高发季节,不少人为了预防感冒戴上了口罩。但它真的有用吗?首先看看你戴的是什么口罩。普通的医用口罩从功能上说并不是用来保护佩戴者的,它纤维交织成网的孔径较大,微小的感冒病毒颗粒可以轻易穿过去,挡下来的只是唾沫口水,也就是说,普通医用口罩是用来防止佩戴者的飞沫带着脏东西污染 A: The effect of ordinary masks poor, wash their hands is the right path. Volatile temperatures in the flu season, many people wear masks to prevent colds. But is it really useful? First of all look at what mask you wear. Ordinary medical masks are not functionally used to protect the wearer. The larger the fiber is, the smaller the size of the entangled network is. The tiny cold virus particles can easily pass through it, blocking the saliva, that is to say, the general medical Masks are used to prevent the wearer’s droplets from being contaminated with dirt