As they get colder and start vaccination.
South Africa for asz one.
Argentina for Russia one.
Aussie and nz ? Donna know which one they use maybe mix of asz and mRNA ones. Mix is bad for science.
Brazil is mess, asz and Chinese mix, each will take credit for success and blame other for failure.
Israel now is the best test for Pfizer, so far so good.
Indonesia same for Chinese coronavac.
We will see.