At Best COVAX Is Going To Supply.

Enough vaccines for frontline healthcare workers.

Then, if you're extremely lucky, vaccines for the most vulnerable over 60's age group.

https://english.ahram.org.eg/NewsContent/2/10/408817/World/Africa/African-Union-drops-AstraZeneca-vaccine,-which-COV.aspx

So the risks with the Astrazeneca vaccine don't really apply.

COVAX recipient nations aren't going to have the option. Of doing something as silly as trying to inflict the Oxford vaccine on their entire population.