The emergence and spread of a novel coronavirus from Wuhan City, Hubei Province of China, has become a global health concern (1). On 30th January 2020, corona virus disease 2019 (COVID-19) was declared to be a global health emergency by the World Health Organization. Since the detection of the coronavirus in late December 2019, COVID-19 has spread beyond to all provinces in China and into 19 countries overseas (2,3). We describe the CT images of one extended family cluster of COVID-19, with mainly asymptomatic patients or patients with only mild symptoms and negative CT findings.