[Transmission characteristics and risk factors of household COVID-19 clusters caused by 2019-nCoV Omicron variant in Tianjin].
Zhonghua Liu Xing Bing Xue Za Zhi
; 43(9): 1370-1375, 2022 Sep 10.
Article
em Zh
| MEDLINE
| ID: mdl-36117341
ABSTRACT
Objective:
To understand the transmission characteristics and risk factors of household COVID-19 clusters caused by 2019-nCoV Omicron variant in Tianjin and provide evidence for COVID-19 prevention and control.Methods:
Field epidemiological method was used to investigate the epidemiological characteristics of COVID-19 cases, and descriptive analysis was used to describe the epidemiological information.Results:
A total of 430 cases were reported in this epidemic in Tianjin, in which 409 cases were included in this study. Among these cases, 70.90% (290/409) occurred in families. The family secondary attack rate was 33.64% The family secondary attack rate in age group 12-17 years (13.79%) was significantly lower than that in age group 18-49 years (36.48%), the OR was 0.378 (95%CI 0.170-0.840). The logistic regression analysis showed that compared with centralized quarantine, the OR of the index cases found in closed-off/controlled areas and in home quarantine were 2.951 (95%CI1.322-6.586) and 2.287 (95%CI1.164-4.495), respectively, compared with the cases without sore throat, the OR of the index cases with sore throat was 3.003 (95%CI 1.576-5.720), and compared with cases in families without completed COVID-19 vaccinations in all members, the OR of the cases in families with completed COVID-19 vaccinations in all members was 0.268 (95%CI 0.132-0.552).Conclusions:
The risk of household transmission of infection with Omicron variant was high. Detecting the index case in closed-off/controlled areas or in home quarantine and sore throat in index cases were the risk factors of the household transmission, completed COVID-19 vaccination was the protective factor.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
/
4_TD
Base de dados:
MEDLINE
Assunto principal:
Faringite
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Influenza Humana
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COVID-19
Tipo de estudo:
Etiology_studies
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Risk_factors_studies
Limite:
Adolescent
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Adult
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Child
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Humans
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Middle aged
Idioma:
Zh
Revista:
Zhonghua Liu Xing Bing Xue Za Zhi
Ano de publicação:
2022
Tipo de documento:
Article