What is the chance..........?!
Question: of a rat recovering from a serious case of Pneumonia?
Answers: of a rat recovering from a serious case of Pneumonia?
probably around 35(living)/65(dying) chance.
take it to the vet and get some anti-biotics.
It can depend on the prior health of the rat. If it was a robust adult rat in its prime (between 4 months and 2 yrs old), then it's chances are better. If the rat is given a proper antibiotic dose, is hydrated and otherwise kept comfortable, recovery is possible. You probably have a 50/50 chance.