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Uso de mascarillas médicas y no médicas/de tela para actividades comunitarias de salud durante la pandemia de COVID-19
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Organización Mundial de la Salud OMS (2021) C_WHO
Source:  https://apps.who.int/iris/bitstream/handle/10665/342536/WHO-2019-nCoV-IPC-Masks-Comm-health-care-2021.1-spa.pdf

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