Impact of community masking on COVID-19: A cluster-randomized trial in Bangladesh

We conducted a cluster-randomized trial to measure the effect of community-level mask distribution and promotion on symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections in rural Bangladesh from November 2020 to April 2021 (N = 600 villages, N = 342,183 adults). We cros...

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Detalles Bibliográficos
Autores principales: Abaluck, Jason, Kwong, Laura H., Styczynski, Ashley, Haque, Ashraful, Kabir, Md. Alamgir, Bates-Jefferys, Ellen, Crawford, Emily, Benjamin-Chung, Jade, Raihan, Shabib, Rahman, Shadman, Benhachmi, Salim, Bintee, Neeti Zaman, Winch, Peter J., Hossain, Maqsud, Reza, Hasan Mahmud, Jaber, Abdullah All, Momen, Shawkee Gulshan, Rahman, Aura, Banti, Faika Laz, Huq, Tahrima Saiha, Luby, Stephen P., Mobarak, Ahmed Mushfiq
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9036942/
https://www.ncbi.nlm.nih.gov/pubmed/34855513
http://dx.doi.org/10.1126/science.abi9069
Descripción
Sumario:We conducted a cluster-randomized trial to measure the effect of community-level mask distribution and promotion on symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections in rural Bangladesh from November 2020 to April 2021 (N = 600 villages, N = 342,183 adults). We cross-randomized mask type (cloth versus surgical) and promotion strategies at the village and household level. Proper mask-wearing increased from 13.3% in the control group to 42.3% in the intervention arm (adjusted percentage point difference = 0.29; 95% confidence interval = [0.26, 0.31]). The intervention reduced symptomatic seroprevalence (adjusted prevalence ratio = 0.91 [0.82, 1.00]), especially among adults ≥60 years old in villages where surgical masks were distributed (adjusted prevalence ratio = 0.65 [0.45, 0.85]). Mask distribution with promotion was a scalable and effective method to reduce symptomatic SARS-CoV-2 infections.

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