I have been following the disaster unfolding in the USA and Sweden on the 
Worldometers site.
I just stumbled on something I hadn't noticed before.
There is an argument that fatality rates can only be calculated by looking at cases that have had an outcome ie death or recovery. That information is available on that site.
The death rate of closed cases in the USA is 17% and in Sweden it is 46%.
The death rate of closed cases in Australia is 2%.
I suppose it could be argued that different testing regimes in each of those countries could distort the figures.  However, the tests per capita in Aus and USA are similar and Sweden's rate is about half. So different testing rates might make Sweden look twice as bad as Australia, but that alone would not make their death rate 23 times ours.
Why is the death rate so high in USA and Sweden?