I would seek the advice of a trusted personal physician, and not blindly follow the claims of a PSA or the blog of unknown internet doctor. I don’t favor *government* Covid vaccine mandates; each of us should be allowed to make the decision to receive or refuse the vaccine based on individual risk-benefit assessment. I also believe that private entities, including employers and businesses, should be allowed to make their own rules regarding the vaccination staus of their employees and customers.
There is a big difference between requiring vaccinations for new hires and changing the rules in the middle of the game for existing employees.
The second is a blatant Nuremberg Code violation, attempting to use duress to influence medical treatment.