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Slow Spread of SARS-CoV-2 in Southern Brazil Over a 6-Month Period: Report on 8 Sequential Statewide Serological Surveys Including 35 611 Participants.

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  • معلومة اضافية
    • المصدر:
      Publisher: American Public Health Association Country of Publication: United States NLM ID: 1254074 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1541-0048 (Electronic) Linking ISSN: 00900036 NLM ISO Abbreviation: Am J Public Health Subsets: MEDLINE
    • بيانات النشر:
      Publication: Washington, DC : American Public Health Association
      Original Publication: New York [etc.]
    • الموضوع:
      COVID-19/*diagnosis ; COVID-19/*epidemiology ; COVID-19 Testing/*statistics & numerical data; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Brazil/epidemiology ; Child ; Child, Preschool ; Female ; Humans ; Male ; Middle Aged ; Prevalence ; Sentinel Surveillance ; Seroepidemiologic Studies ; Social Class ; Young Adult
    • نبذة مختصرة :
      Objectives. To evaluate the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) over 6 months in the Brazilian State of Rio Grande do Sul (population 11.3 million), based on 8 serological surveys. Methods. In each survey, 4151 participants in round 1 and 4460 participants in round 2 were randomly sampled from all state regions. We assessed presence of antibodies against SARS-CoV-2 using a validated lateral flow point-of-care test; we adjusted figures for the time-dependent decay of antibodies. Results. The SARS-CoV-2 antibody prevalence increased from 0.03% (95% confidence interval [CI] = 0.00%, 0.34%; 1 in every 3333 individuals) in mid-April to 1.89% (95% CI = 1.36%, 2.54%; 1 in every 53 individuals) in early September. Prevalence was similar across gender and skin color categories. Older adults were less likely to be infected than younger participants. The proportion of the population who reported leaving home daily increased from 21.4% (95% CI = 20.2%, 22.7%) to 33.2% (95% CI = 31.8%, 34.5%). Conclusions. SARS-CoV-2 infection increased slowly during the first 6 months in the state, differently from what was observed in other Brazilian regions. Future survey rounds will continue to document the spread of the pandemic.
    • Comments:
      Comment in: Am J Public Health. 2021 Aug;111(8):1387-1388. (PMID: 34464201)
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    • الموضوع:
      Date Created: 20210629 Date Completed: 20210909 Latest Revision: 20211008
    • الموضوع:
      20240829
    • الرقم المعرف:
      PMC8489617
    • الرقم المعرف:
      10.2105/AJPH.2021.306351
    • الرقم المعرف:
      34185552