New coronavirus pneumonia is a respiratory transmission disease, so the best daily prevention strategy is to cut off the transmission pathway by wearing a mask. In terms of the choice of masks to wear, disposable medical masks are recommended, which are different from ordinary daily anti-fog masks because they are mainly for protection against respiratory secretions. Medical institutions have invasive operations, such as tracheal intubation, tracheoscopy, to the patient to take the respiratory secretions to wear N95 masks, which will have a better protective effect. But for ordinary people, because N95 masks are difficult to buy and the cost is relatively high, daily work or take public transportation when wearing ordinary medical masks has been enough. In fact, the choice of what kind of mask is not the most important, but to ensure that the correct wear and the whole wearing mask. For example, when taking public transportation or riding in an elevator, the mask should not be removed too often, otherwise the protective effect will not be achieved. Source: Dr. Yurai