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10.3201/eid2708.204757

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34087090!8314805!34087090
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suck abstract from ncbi


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pmid34087090      Emerg+Infect+Dis 2021 ; 27 (8): 2135-2143
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  • Social Distancing, Mask Use, and Transmission of Severe Acute Respiratory Syndrome Coronavirus 2, Brazil, April-June 2020 #MMPMID34087090
  • Goncalves MR; Dos Reis RCP; Tolio RP; Pellanda LC; Schmidt MI; Katz N; Mengue SS; Hallal PC; Horta BL; Silveira MF; Umpierre RN; Bastos-Molina CG; Souza da Silva R; Duncan BB
  • Emerg Infect Dis 2021[Aug]; 27 (8): 2135-2143 PMID34087090show ga
  • We assessed the associations of social distancing and mask use with symptomatic, laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection in Porto Alegre, Brazil. We conducted a population-based case-control study during April-June 2020. Municipal authorities furnished case-patients, and controls were taken from representative household surveys. In adjusted logistic regression analyses of 271 case-patients and 1,396 controls, those reporting moderate to greatest adherence to social distancing had 59% (odds ratio [OR] 0.41, 95% CI 0.24-0.70) to 75% (OR 0.25, 95% CI 0.15-0.42) lower odds of infection. Lesser out-of-household exposure (vs. going out every day all day) reduced odds from 52% (OR 0.48, 95% CI 0.29-0.77) to 75% (OR 0.25, 95% CI 0.18-0.36). Mask use reduced odds of infection by 87% (OR 0.13, 95% CI 0.04-0.36). In conclusion, social distancing and mask use while outside the house provided major protection against symptomatic infection.
  • |*COVID-19[MESH]
  • |*SARS-CoV-2[MESH]
  • |Brazil/epidemiology[MESH]
  • |Case-Control Studies[MESH]
  • |Humans[MESH]
  • |Masks[MESH]


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