It's really shaky to say "religions" don't oppose vaccines because religious interpretation (and personal interactions with their god(s)) is up to the individual.
But it's all irrelevant in this case because Google is almost entirely an at-will employer. They can change the terms of the agreement at any time - take it or leave it.
But it's all irrelevant in this case because Google is almost entirely an at-will employer. They can change the terms of the agreement at any time - take it or leave it.