Source control is a strategy for reducing disease transmission by blocking respiratory secretions produced through breathing,[1] speaking, coughing, sneezing[2] or singing.[3] Multiple source control techniques can be used in hospitals,[4] but for the general public wearing personal protective equipment during epidemics or pandemics, respirators provide the greatest source control,[1] followed by surgical masks, with cloth face masks recommended for use by the public only when there are shortages of both respirators and surgical masks.[5][6][7]
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