[A strike]

The “legality” of what?

Yes, you do.

[MarMema]

https://www.employmentlawfirms.com/resources/can-my-employer-require-me-to-get-the-covid-19-vaccine.html

The workplace should be safe and as free of covid as possible.

So should restaurants, the library, domestic flights, and
concerts/theatres.

Unvaccinated are filling hospitals at over 90% and far more likely to be infected with covid.

If the antivaxxers don’t want to protect themselves from disease then they should be denied all of the above and more. People with infants and those who are immune compromised should not have to stay home because of those who don’t want to contribute to the safety of society.