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Epidemiological and clinical characteristics of 214 families with COVID-19 in Wuhan, China #MMPMID33578019
Yi B; Fen G; Cao D; Cai Y; Qian L; Li W; Wen Z; Sun X
Int J Infect Dis 2021[Apr]; 105 (?): 113-119 PMID33578019show ga
OBJECTIVE: To investigate the epidemiological dynamics, transmission patterns, and the clinical outcomes of Coronavirus disease 2019 (COVID-19) in familial cluster patients in Wuhan, China. METHODS: Between January 22, 2020, and February 4, 2020, we enrolled 214 families for this retrospective study. The COVID-19 cases were diagnosed using real-time reverse-transcriptase polymerase chain reaction (RT-PCR). The number of COVID-19 subjects in a family, their relationship with index patients, the key time-to-event, exposure history, and the clinical outcomes were obtained through telephone calls. RESULTS: Overall, 96 families (44.9%) met the criteria of a familial cluster, which is at least one confirmed case in addition to the index patient in the same household. The secondary attack rate was 42.9%, and nearly 95% of index patients transmitted the infection to =2 other family members. High transmission pattern was noted between couples (51.0%) and among multi-generations (27.1%). The median serial interval distribution in familial clusters was 5 days (95% CI, 4 to 6). The case fatality rate was 8.7% in index patients and 1.7% in non-familial clusters patients (p = 0.023). CONCLUSIONS: There is a related higher attack rate and worse clinical outcomes in COVID-19 family clusters.