I spoke with the vet earlier and he is sure my raccoon should be fine, as long as he eats well and does not have more trouble with fleas. I've got enough of the stronger flea treatment to last a whole year - I fully expect him to recover quickly and completely.
Trying to help Whosajiggawaaa to find anything that could possibly be useful for his mom's cancer - exchanged a couple of PMs with some possibly useful info. If anyone else has any suggestions for anything that might help, I am sure Whosajiggawaaa would like to hear about it. He is in South Africa, so if you find clinical trials, they need to be available there in his area
I'll try to get him some more info tomorrow, but I really need to sleep now.