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The WHO Covid-19 Research Database is a resource created in response to the Public Health Emergency of International Concern (PHEIC). Its content remains searchable and spans the time period March 2020 to June 2023. Since June 2023, manual updates to the database have been discontinued.

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A multi-family cluster of COVID-19 associated with asymptomatic and pre-symptomatic transmission in Jixi City, Heilongjiang, China, 2020.

Zhang, Hongyang; Hong, Chengcheng; Zheng, Qulu; Zhou, Pengzheng; Zhu, Yuliang; Zhang, Zhongkai; Bi, Qifang; Ma, Ting.

Emerg Microbes Infect ; 9(1): 2509-2514, 2020 Dec.

Article in English | MEDLINE | ID: covidwho-947628

ABSTRACT

We investigated a multi-family cluster of 22 cases in Jixi, where pre-symptomatic and asymptomatic transmission resulted in at least 41% of household infections of SARS-CoV-2. Our study illustrates the challenge of controlling COVID-19 due to the presence of asymptomatic and pre-symptomatic transmission even when extensive testing and contact tracing are conducted.

Subject(s)

COVID-19/epidemiology , COVID-19/transmission , Contact Tracing/statistics & numerical data , Pandemics , SARS-CoV-2/genetics , Adult , Asymptomatic Diseases , COVID-19/diagnosis , COVID-19/virology , COVID-19 Testing/methods , Child , China/epidemiology , Family , Female , Humans , Male , Public Health , Quarantine/organization & administration , Reverse Transcriptase Polymerase Chain Reaction , SARS-CoV-2/isolation & purification , Severity of Illness Index , Surveys and Questionnaires

ABSTRACT

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