This resource is also from health.gov.au and I'm advised by an...

This resource is also from health.gov.au and I'm advised by an infection prevention specialist that I know quite well that it is quite a good resource: australian-health-sector-emergency-response-plan-for-novel-coronavirus-covid-19_1.pdf

The graph on page 15 (copy below) in particular, describes both the uncertainty and the seriousness of this particular outbreak.



The same person also told me this video, "Coronavirus outbreak: WHO expert says countries must shift mindset to virus preparedness | FULL", is current and worth watching (you'll need a couple of hours ).