i have not been able to find it out for sure
a couple articles said or implied that the post office was exempt
i think they are confusing the one postal unions letter about not forcing them to be vaced
but they are not "forcing" you
if you don't get it you will just have to wear a mask at all times and get tested all the time
have heard everything from twice a week to every 2 weeks
and who pays for the testing?