直接贴结论吧: Conclusions/Significance Any type of general mask use is likely to decrease viral exposure and infection risk on a population level, in spite of imperfect fit and imperfect adherence, personal respirators providing most protection. Masks worn by patients may not offer as great a degree of protection against aerosol transmission.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2440799/?utm_source=share&utm_medium=ios_app&utm_name=iossmf
给大家参考一下。
非常同意。买不到。店里有吗?要大家戴是拉仇恨。