Have flights booked in 3 weeks to Australia for Pesach.
Whats the speculation on international flight travel?
Any speculation how friendly USA and Aus will be at that stage?
The best advice I can give you is prepare for the worst and hope for the best.
Nobody, not even so-called "experts" knows what will happen in 3 weeks. It could get much worse, or it can blow over. Some suggest that warmer temperatures can kill off the virus in the same way it kills off the flu, while others suggest that this is not like the flu.
Again, prepare to make Pesach here, and if you are lucky, the world may be back to normal in three weeks.