how would he get an RI if in fact he has an RI? The same way we get colds or other minor illnesses.
If he does have an RI what is the treatment? Please don't tell me it's shots!?!?! OK I wont tell you its shots. Actually there are many options available just express your concerns to your vet and you both agree upon a treatment plan for your snake
What's the normal prognosis if he does have an RI? Will he recover 100%? With proper treatment he has a 100% chance of recovery from RI

Charles