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Objective: To identify, systematically review, and summarize the best scientific evidence available on the efficacy and safety of homemade cloth face masks for the community. Methods: The search was conducted using the Cochrane, PUBMED, EMBASE, and LILACS databases, as well as grey literature, using Opengrey. A search was also conducted using references from primary and secondary studies that were found. No language or time period restrictions were applied. All papers that objective was to check efficacy and safety of the use of cloth face masks as protection against viral transmission were included, as well as laboratory studies assessing barriers against particles. We excluded studies approaching the use of face masks by healthcare providers. Two independent reviewers selected the studies, and discrepancies were decided by a third reviewer. Results: No randomized clinical trials involving cloth face masks for the general population were found. Seven studies assessing different types of cloth to prevent the penetration of droplets at a laboratory level and a review study were included. Conclusion: Using cloth face masks provides a barrier against droplets when compared with not using any face masks. The face mask is an additional preventive mesuare and must be used along with respiratory etiquette hand hygiene social distancing and isolation of cases.
Taminato, M., Mizusaki-Imoto, A., Saconato, H., Franco, E. S. B., Puga, M. E., Duarte, M. L., & Peccin, M. S. (2020). Homemade cloth face masks as a barrier against respiratory droplets - Systematic review. ACTA Paulista de Enfermagem. Departamento de Enfermagem/Universidade Federal de Sao Paulo. https://doi.org/10.37689/ACTA-APE/2020AR0103
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