FTA: The reason? In most states, if a person is fired with cause for violating company policy - such as mandatory vaccinations - they are not entitled to unemployment benefits and payments.
"Even something as simple as a dress code that says you have to wear a tie, and that's the company's policy, and you say, 'I don't believe in wearing a tie, so I'm not going to do it.' That's insubordination," says John T. Harrington, Principal at The Employment Law Group. "It's misconduct, and it would likely disqualify you from receiving unemployment benefits."
Harrington said there are only two exemptions to a vaccination requirement - medical or religious. In both cases, however, exemptions are determined on a case-by-case basis with employers. Just because one employee is granted a religious exemption, it doesn't mean that will extend to anyone else.
Maybe not always - that's true, but the article doesn't seem to mention it at all, and in some places it may be relevant, so, just wanted to throw that out there.