I can't speak for other poorer countries and then also of course not for all South Africans but I can tell you a huge percentage of our poor and not so poor at all are unvaxed precisely because they don't intend to be and not at all due to availability/accessibility. Even in my own family and certainly amongst others I have had dealings with who would be considered poor.
My point being that in SA if you WANTED to get vaccinated you probably have both your shots already apart from obvious exceptions like for instance I appreciate the uncertainty for pregnant women and people in.. not sure if this si the best word but.. exceptional circumstances. I remember we were clambering to get vaccinated even if just as a means to help curb spread and thus mutations but now you just don't see the regular vax spots even remotely as busy.
I'm all for choice but feel it should be informed choice and I just don't believe the general SA public is anything close to informed and we have a very real distrust for government and public institutions across most of our population and not for no reason sadly. But I'm rambling now, sorry.