It is crucial to isolate patients, trace and quarantine contacts as early as possible because asymptomatic infection began to appear [21]. Most importantly, the extent of interhuman transmission needs to be determined. Transmission of SARS-CoV and MERS-CoV occurred to a large extent by means of superspreading events [27, 28]. Superspreading events have been implicated in 2019-nCoV transmission, so educate the public on both food and personal hygiene, and compliance to infection isolation to prevent super-spreading events deserves highly attention.