COVID-19 infection prevention and control living guideline: mask use in community settings, 22 December 2021

World Health Organization - COVID-19 infection prevention …, 2021 - pesquisa.bvsalud.org
COVID-19 infection prevention and control living guideline: mask use in community settings,
22 December 2021 | Geneva; World Health Organization; 2021. (WHO/2019-nCoV/IPC_masks/2021.1) …
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[引用][C] COVID-19 infection prevention and control living guideline: mask use in community settings, 22 December 2021

World Health Organization - 2021 - apps.who.int
This first edition of the Infection Prevention and Control in the context of coronavirus disease
(COVID-19): Living Guideline provides the most up to date technical guidance on mask use …