You're ready to swap your old cloth masks for N95s as some experts recommend, but the higher price tag and two little words -- "single use" -- are giving you pause. How long can you really wear an N95 and still protect yourself and others from Covid-19 risk?


원문출처 : https://www.cnn.com/2022/01/13/health/n95-mask-wear-care-tips-wellness/index.html