Digging around, you can find some nice little laws. For example, by Illinois law (which their worthless toilet removing governor tightened his grips on vaccine mandates the other day), if you object to the COVID vaccine under moral or conscience grounds, they cannot discriminate against you. In IL, if you lost your job over a company mandate, find a lawyer. If your company is tinkering with a mandate, show HR this. Many states likely have laws like this. Start digging.