We report epidemiologic, laboratory, and clinical findings for 7 patients with 2019 novel coronavirus disease in a 2-family cluster. Our study confirms asymptomatic and human-to-human transmission through close contacts in familial and hospital settings. These findings might also serve as a practical reference for clinical diagnosis and medical treatment.

中文翻译：

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徐州2族群中SARS-CoV-2的无症状和人际传播。

我们在2个家庭中报告了7例2019年新型冠状病毒疾病患者的流行病学，实验室和临床发现。我们的研究证实了在家庭和医院环境中通过密切接触而无症状和人与人之间的传播。这些发现也可以作为临床诊断和医学治疗的实用参考。