Simple calculations. High probability that it'll spread to at least 40% of the population. Death rate of at least 1%. That's over 90,000 in Australia.
Of course it may not spread. Good quarantine measures may stop it in its tracks.
But that may also not be accurate, as a large number of cases are asymptomatic or written off as something else. In America there's over 500 cases, a majority of those in Seattle. But the experts are saying that there's likely to be over 1,000 cases in Seattle that haven't been picked up.
Main problem being that it's hard to test for. New York developed a test and started using it on mass and the test turned out to be faulty.
So there's always a chance that the kill rate is much lower than current measurements.
My interpretation of everything you've just said is as follows:
There is an enormous amount of uncertainty. No one really knows what will happen with number of infections or number of deaths.
So why are people putting out numbers like 50,000-250,000 people could die in Australia when there is clearly no certainty behind those figures. Completely made up.
It's no wonder that some people are acting like total bogans and selfish individuals and having fights in supermarkets.
Personally, the approach I take is to look at China and then apply some reasonable thought processes for what may eventuate in Australia
Upside:
- Temperatures in Aus never get as cold as China / many northern hemisphere countries - therefore good chance that transmission within Australia will be at drasticly reduced rates (this factor had at least some impact on SARS in 2003).
- There were so many initial transmissions and deaths in Wuhan because the Chinese Govt buried their heads in the sand. They made matters worse when they effectively isolated a city 1.5 times the size of Sydney and left them without adequate medical/hospital care for a period. This is unlikely to happen in Australia due to the Governments serious approach to infections when they arise.
- Far lower population densities in most Australian suburbs than China
- Far greater hygeine standards in Australia compared to China
- Lessons learned from China are able to be applied in a more timely manner in Australia so better care and quarantining of patients when they are identified
Downside:
- Democratic system of government / 'softly softly' approach by government may not be strict enough to adequately quarantine cases when they arise.
- Government may not be responsive enough / tough enough in relation to travel restrictions from other countries
Overall, I think the upsides for Australia outweigh the downsides and on that basis I personally think the deaths will be far lower in Australia. This virus has been getting around for a while now (at least weeks if not more than 1+ month), yet it is only responsible for 3 deaths.