In 2000, WHO declared measles "eradicated" in the United States [1]. Of course, that's no longer the case thanks to those who have decided their feelings and watching an unverified Youtube video trumps science.
Requiring vaccination is not new. As a matter of law in the US the issue was settled by the Supreme Court in Jacobson v. Massachussetts in 1905 [2]. Mandatory vaccination has been used to effectively eliminate smallpox and polio, in particular.
We've now administered billions of doses of Covid-19 vaccines. The idea that we're somehow missing side effects is quite frankly ridiculous at this point.
That idea also shows a basic misunderstanding of what's going on here. Immune system responses to something like a vaccine are actually extremely quick. This is not the same as, say, other drugs or compounds that live in the body for a long time. The body's response is known very quickly, which is why the very slight possibility of a clotting issue with AstraZeneca, for example, was identified extremely quickly.
Vaccines just aren't a personal choice. If it was, nobody would care what individuals did. The idea that someone's baseless opinions should trump public good as a matter of principle is sad, false as a matter of law and baseless as a matter of principle.
Contrary to the opinion of many (sadly) absolute selfishness isn't a virtue, it's just selfishness. And it's the latest iteration of the underlying anti-intellectualisms in the US.
What's especially disappointing, even worrying, is just how much traction these baseless ideas get from those who allegedly have a science education.
With NYC's mandate (which I support), it still doesn't mean you have to get vaccinated. It just means there are consequences if you don't. We already have this with schools. While we're at it, it's time to stop this nonsense of vaccines being against one's "personal beliefs" to get an exemption.
If you want to live in a society that benefits from mass vaccination you should be prepared to do your part, particularly when that part just means getting an extremely safe needle. If you want to opt out of that, you also opt out of the benefits of that.
[1]: https://en.wikipedia.org/wiki/Measles_resurgence_in_the_Unit...
[2]: https://en.wikipedia.org/wiki/Jacobson_v._Massachusetts