Social Distancing, Mask Use, and Transmission of Severe Acute Respiratory Syndrome Coronavirus 2, Brazil, April–June 2020

Details

• Alternative Title:
  Emerg Infect Dis
• Personal Author:
  Gonçalves, Marcelo Rodrigues ; dos Reis, Rodrigo Citton Padilha ; Tólio, Rodrigo Pedroso ; Pellanda, Lucia Campos ; Schmidt, Maria Inês ; Katz, Natan ; Mengue, Sotero Serrate ; Hallal, Pedro C. ; Horta, Bernardo L. ; Silveira, Mariangela Freitas ; Umpierre, Roberto Nunes ; Bastos-Molina, Cynthia Goulart ; Souza da Silva, Rodolfo ; Duncan, Bruce B.
• Description:
  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.
• Subjects:
  Case-Control Studies Coronavirus Infections/Prevention & Control Covid-19/Prevention & Control Humans Masks Physical Distancing
• Source:
  Emerg Infect Dis. 27(8):2135-2143
• Pubmed ID:
  34087090
• Pubmed Central ID:
  PMC8314805
• Document Type:
  Journal Article
• Place as Subject:
  Brazil
• Volume:
  27
• Issue:
  8
• Collection(s):
  Emerging Infectious Diseases
• Main Document Checksum:
  urn:sha256:f28f4003884b381dc92d8eb3d9bf0d02aa5d3de13150a06e4f1175f7c088a1dd
• Download URL:
  https://stacks.cdc.gov/view/cdc/108787/cdc_108787_DS1.pdf
• File Type:
  [PDF - 1.35 MB ]