He didn't want to take it, because he believes he developed antibodies against covid the first time he had covid, to give him enough antibodies created to stave off severe covid and hospitalization....and he likely had created enough antibodies to keep himself from getting severe covid. He's not against vaccines because they are out to kill us, b.s.If he wanted to keep his job. That's called duress.
And I personally believe if you can show a recent covid antibody test and show you have enough antibodies, this is in the least equivalent to being vaccinated if not better, and a vaccine should not be required of those who have had the virus already and have solid protection already....but I'm no scientist or doctor or bureaucrat... and my opinion doesn't count!