An increasing number of cases evidenced the 2019-nCoV have the ability to transmit among humans [13, 14]. To date, no research found the special susceptible population of the new virus seems like SARS [15], 2019-nCoV is easily transmissible in human generally, but disease severity is not correlated to transmission efficiency [16]. According to the Chinese Center for Disease Control and Prevention (China CDC) reported that laboratory tests ruled out SARS-CoV, MERS-CoV, influenza, avian influenza, adenovirus and other common respiratory pathogens. CDC considered the 2019-nCoV as a possible pathogen causing the outbreak [16]. The 2019-nCoV can cause severe illness in old patients with comorbidities and transmit readily among people [17]. At present, the mortality of 2019-nCoV in China is 2.3% [3], compared with 9.6% of SARS and 34.4% of MERS reported by WHO [16, 18]. Based on the current data, the new virus is not as fatally as many people thought.