If we go down the path of punishment they would need to be tightly targeted. The "just following orders" defence might not be morally acceptable but it would probably need to be legally valid.

Jail time for all infectious disease doctors/epidemiologists is appropriate. We would be better off without any of them anyway. (Obviously, the "all" doesn't include those few who explicitly argued against this shitshow).

Doctors (the useful ones) who publicly argued for mandatory vaccination will be fined heavily.

A perpetual propaganda campaign to remind doctors and nurses that they are not gods might also be in order.