Sick Dog

My brother bought this puppy that was already sick and he didn't even know. He took him to the vet the day after buying him and was told he has Parvo. He is not wanting give up on him. He named him Blaze and he fell in love with him less then a day... He is starting to struggle with his hospital bills but refuses to put him to sleep. He is wanting Blaze to fight and get through this..

Anything will help

Thanks