FWIW, there was a vocal contingent of Marxists on Twitter who saw the mandates for the erosion of worker power and rights that they were, and vigorously opposed them. Richard Wolff even came around eventually, as well as Jimmy Dore after having his own personal run-in with the nasty side effects which are all too common with these vaccines.
Sadly, though, some of the most awful scapegoaters of the unvaccinated were indeed on the "left." Noam Chomsky even said they should be excluded from society completely, and if that meant they couldn't even obtain food, well, that would be their problem.