Trigger words: medically-appropriate
Indicator sentences: I'd ask you to elaborate on your definition of "medically-appropriate" as this will be essential for further discussion.
Negotiation parts: If the doctor will give a certificate for it, you don't have to get the shot. I think it is okay for there to be some extra leniency here, because the intent is not to provide subpar medical care to those already suffering.
Indicator sentences: I feel like this is a slippery slope argument, but maybe I'm not understanding your point. Can you elaborate, or show how this is different from a fallacious slippery slope argument?