[curryst]

> give everyone with a less effective vaccine an additional dose of whatever works - which will probably be a new vaccine that doesn't exist yet!

I would be careful about assuming that's an option. The vaccines have been tested individually, but have not been tested together. It's not out of the realm of possibility that getting some combination triggers some kind of immune reaction or something else.

> Don't forget that mutations are continuous. We might be looking at another mutation in 3 months as supply catches up that evades vaccines in a completely new way.

This is, sadly, a reason for poorer countries to delay vaccination. If there's going to be a mutation that evades this vaccine, and you can only afford one round of vaccines for everyone, you'd be better off waiting for the vaccine that prevents both.

Based on the last article about this, SA doesn't have the money to do 2 rounds of vaccines. A lot of the money was spent suspiciously, but now funding is limited. It seems that anyone who gets a subpar vaccine is just going to be stuck with subpar coverage.