Impact of community masking on COVID-19: A cluster-randomized trial in Bangladesh.
Science
; 375(6577): eabi9069, 2022 Jan 14.
Article
in English
| MEDLINE | ID: covidwho-1642796
ABSTRACT
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.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Communicable Disease Control
/
COVID-19
/
Health Promotion
/
Masks
Type of study:
Experimental Studies
/
Observational study
/
Randomized controlled trials
Limits:
Female
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
English
Journal:
Science
Year:
2022
Document Type:
Article
Affiliation country:
Science.abi9069
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