Given that 2019-nCoV is no longer contained within Wuhan, other major Chinese cities
are probably sustaining localised outbreaks. Large cities overseas with close transport
links to China could also become outbreak epicentres, unless substantial public health
interventions at both the population and personal levels are implemented immediately.
Independent self-sustaining outbreaks in major cities globally could become inevitable
because of substantial exportation of presymptomatic cases and in the absence of large-scale
public health interventions.