The USA is all over the place with vaccinations, as each state is different. New Hampshire actually seems to have its shit together, and our Republican governor has been excellent throughout this whole thing. The appointment-making website is confusing a lot of people, who can't get their second-dose appointment, so now, when you get the first, they give you an appointment for the second. So having a date for the first shot in March has allowed them time to work that particular bug out. I can last.

I don't know how hard I tried to get this across when I was still working in public health, but basically, your health depends on your brother/sister's health. One lunchtime debate I remember was when someone took a Libertarian point of view*. People should pay to be considered part of society, and eligible for benefits such as health care.
The problem with that was/is, when the have-nots get communicable diseases, you get them, too. Diseases don't care about how much money or power people have.
The virus will continue replicating and mutating in countries that don't get vaccines, and those mutations will end up on our doorstep. Some of them may involve vaccine-resistant strains.

We ARE our brother's keeper.

* He was a doctor, my boss's boss's boss, and one of his specialties was public health. He just liked to debate.