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2020-2021 学年下半年不列颠哥伦比亚省最大学区中 SARS-CoV-2 的传播动态。

Transmission dynamics of SARS-CoV-2 in British Columbia's largest school district during the second half of the 2020-2021 school year.

机构信息

Public Health Agency of Canada, Ottawa, Ontario, Canada.

Office of the Medical Health Officer, Fraser Health, Surrey, British Columbia, Canada.

出版信息

Can J Public Health. 2022 Oct;113(5):653-664. doi: 10.17269/s41997-022-00659-z. Epub 2022 Jul 14.

DOI:10.17269/s41997-022-00659-z
PMID:35834166
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9281576/
Abstract

OBJECTIVES

To determine the extent and characteristics of in-school transmission of SARS-CoV-2 and determine risk factors for in-school acquisition of COVID-19 in one of Canada's largest school districts.

METHODS

We conducted a retrospective chart review of all reportable cases of COVID-19 who attended a kindergarten-Grade 12 (K-12) school within the study area between January and June of the 2020-2021 school year. The acquisition source was inferred based on epidemiological data and, when available, whole genome sequencing results. Mixed effects logistic regression was performed to identify risk factors independently associated with in-school acquisition of COVID-19.

RESULTS

Overall, 2877 cases of COVID-19 among staff and students were included in the analysis; of those, 9.1% had evidence of in-school acquisition. The median cluster size was two cases (interquartile range: 1). Risk factors for in-school acquisition included being male (adjusted odds ratio [aOR]: 1.59, 95% confidence interval [CI]: 1.17-2.17), being a staff member (aOR: 2.62, 95% CI: 1.64-4.21) and attending or working in an independent school (aOR: 2.28, 95% CI: 1.13-4.62).

CONCLUSION

In-school acquisition of COVID-19 was uncommon during the study period. Risk factors were identified in order to support the implementation of mitigation strategies that can reduce transmission further.

摘要

目的

确定 SARS-CoV-2 在学校内传播的程度和特征，并确定加拿大最大学区之一学校内 COVID-19 感染的危险因素。

方法

我们对 2020-2021 学年 1 月至 6 月期间在研究区域内就读幼儿园至 12 年级（K-12）学校的所有有报告病例的 COVID-19 报告病例进行了回顾性图表审查。根据流行病学数据推断感染源，在有条件的情况下，根据全基因组测序结果推断感染源。采用混合效应逻辑回归分析确定与学校内 COVID-19 感染独立相关的危险因素。

结果

总共纳入了 2877 名教职员工和学生的 COVID-19 病例进行分析；其中，9.1%的病例有校内感染的证据。中位聚集病例数为 2 例（四分位距：1）。校内感染的危险因素包括男性（调整后的优势比 [aOR]：1.59，95%置信区间 [CI]：1.17-2.17）、教职员工（aOR：2.62，95% CI：1.64-4.21）以及就读或工作于独立学校（aOR：2.28，95% CI：1.13-4.62）。

结论

在研究期间，校内 COVID-19 感染并不常见。确定了危险因素，以便支持实施进一步减少传播的缓解策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fbd/9481812/b4f93ed8f969/41997_2022_659_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fbd/9481812/877a66a46f17/41997_2022_659_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fbd/9481812/b4f93ed8f969/41997_2022_659_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fbd/9481812/877a66a46f17/41997_2022_659_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fbd/9481812/b4f93ed8f969/41997_2022_659_Fig2_HTML.jpg

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