Tom Hanks recovering in AUS.

SYDNEY — Tom Hanks and his wife Rita Wilson are isolated in stable condition in an Australian hospital Thursday after contracting the new coronavirus, the actor and Australian officials said.

Even though Hanks and his wife appeared to contract the disease in Australia, given the number of other Covid-19 cases of arrivals from the US in the last couple of weeks it's surprising that the Australian government hasn't banned entry in the same way that it has for China, South Korea, Iran and Italy.

Australia has detected 269 cases of the COVID-19 virus so far, with a large number of new cases now coming from the United States, Morrison said, describing the country as a "major source".

https://www.channelnewsasia.com/news/world/coronavirus-covid-19-australia-isolate-arrivals-12539778


United States
Coronavirus Cases: 3,502
Deaths:   63

Wen you consider the lack of testing that number of cases will soon be on par with Italy if they ever get it together in terms of testing. Perhaps the number to focus on will be deaths. 
At the moment that mortality rate in the US is double that of Korea.  Of course that number would be lower with more testing. So assuming the mortality rate should be about the same that number of cases should be more like 7000,  Even more startling is the number of new cases. Assuming exponential growth it's going to get very messy within a couple of weeks. 

https://www.worldometers.info/coronavirus/

https://www.worldometers.info/coronavirus/country/us/