To limit the spread of respiratory diseases, facemasks can be used by: – healthy people, avoiding thus contamination by infected individuals – infected people, limiting the spread of viruses to susceptible individuals The use of masks is intuitively logical, as it provides a barrier, preventing the spread of droplets or aerosol containing viral particles. In fact, studies have shown that surgical masks or respirators are able to retain a large part of the viruses expelled by infected people. Under ideal conditions, which include the periodic replacement of surgical masks and receiving training for proper aseptic techniques, masks can be effective

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