title: Microbial filtration by surgical masks.
mesh_terms: D000336:Aerosols; D001419:Bacteria; D005374:Filtration; D006801:Humans; D008397:Masks / Q000592:standards*; D008722:Methods; D009305:Nasopharynx / Q000382:microbiology; D013210:Staphylococcus; D013523:Surgical Equipment / Q000592:standards*; D013530:Surgical Wound Infection / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D000336:Aerosols