AZ supply has not been constrained during May and June, it is plentiful hence why walks ups are possible. GPRCs have had much unused supply from the start, mass vac clinics also heaps of supply.
The supply constraint atm is pretty much all Pfizer.
Well not entirely surprising given recent death of someone in early 50s, and fact that in most comparable countries in Europe AZ is only recommended for over 65s.
It was my understanding that Australia is funding doses under Covax for distribution in poorer nation not that we are receiving doses from Covax for use in Australia. Its good if Im wrong, but to date Covax has been distributing vaccines in Africa.