www.theguardian.com/society/2021/apr/13/australia-wont-buy-johnson-johnsons-one-dose-covid-vaccine-due-to-astrazeneca-similarities
I know quite a lot of Ozzies who are completely stranded outside their country due to the fact that they cannot keep small children within a hotel room for two weeks and pay a fortune for the priviledge. As it is, it's looking like Oz will not be removing its quarantine requirements until well into 2022 at the earliest.
I mean, I do think that a basic strategy of "(1) Hold borders tight with Zero Covid until the vax>(2) Unroll vax> (3) Open borders" is a sound one, but it does depend on the second and third bits of the plan actually happening...