claim: respiratory virus shedding in reducing breath and efficacy of face masks
evidence_1: 1: efficacy of surgical face masks in reducing respiratory virus shedding in respiratory droplets and aerosols of symptomatic individuals with coronavirus, influenza virus or rhinovirus infection.", "a subset of participants provided exhaled breath samples for both mask interventions (influenza a virus, n = 7; influenza b virus, n = 2).", "influenza virus aerosols in human exhaled breath: particle size, culturability, and effect of surgical masks.")