Matrix Science Medica (MSM)

One of the most important measures advocated for the prevention of transmission of the coronavirus disease 2019 (COVID‑19) infection is the use of a face mask.[1] However, this measure will not be useful if the compliance of the population is not good. The protection offered by the masks does not depend only on the type of mask but more importantly on how correctly the mask is used. The best and most efficient masks are the N95 and KF94 HEPA masks; however, they are uncomfortable to wear, need to be tightly fit to the face, and are costly. Comparatively, surgical masks are more comfortable and have long been proven to be effective; however, the loose‑fitting leads to possible leakage of aerosols. Cotton masks are much more comfortable but their efficacy is the least