It wouldn't be an underclass, it would be their choice. They wouldn't be getting forced to do anything, they would just be getting told there are certain things that they can't do. What if someone chooses not to take a driving test? Is it infringing on their rights to forbid them to drive? No, it's a safety issue. Every choice we make in life has consequences, big or small, and choosing not to help protect others that are more vulnerable, at no cost and with very little risk, is no different. Smelly folk in pubs get shunned and, I would imagine, their smelliest is less "dangerous" than the unvaccinated. --- Or maybe, since the majority would be vaccinated, it would be the unvaccinated who would have to travel on specially arranged flights, and probably at a higher cost.