Ann: Sydney Airport Traffic Performance February 2020, page-96

Things wont ever go back to normal.
I think they will have to slow passenger traffic down do they can adopt proper biosecurity checks for coronavirus on everyone at numerous levels of the airport. At the entry, at the gates, before they board, before they get off the plane. And hand sanitisation as well. I think the government has seen the error of it's ways. We can not afford another occurrence of this. It will bankrupt the country.
I see the only answer and insurance against this happening again is strict bio security, and that's a big bottle neck.