I think it's just a tough time to be Prime Minister in Australia right now, unfortunately Scott Morrison has had 3 disasters he has had to deal with in a very short period of time.
However contrary to Scott Morrison and Dan Andrews, I would say people should probably hold back a bit from going to big public events, and try to stay out of crowded places when possible, if possible, just to help slow numbers from growing due to someone spreading the virus.
Not trying to raise any alarm here, but it's just about being sensible.
Being sensible should go for supermarkets as well, people do not need to go doomsday prepping all at once, we need to make sure other people can get the stuff they need too and not take it all for themselves, but unfortunately too many are doing it and that's leading to items running off shelves really fast.
In the modern day, if there was a world war coming, and if it was known some nation/nations were going to attack Australia, supermarkets would be empty in one day, and you would even be having some human stampedes in a rush for people to get their supplies and a lot would even miss out. So maybe there needs to be a way to better manage this?