Sorry but the moral of the story is responsibility. Your friend chose to BUY and not adopt when there are plenty of animals looking for a home in Qatar. The souq is notorious for animals having parvo. She then takes it to a vet that is well known for overcharging. Your friend made the choice and she needs to learn the consequences of that. There are many homeless animals at 2nd Chance, QAWS, DID and CIQ that are deserving of public support. Your friend needs to shoulder her responsibilities.
A dog with parvo should NEVER be near any other dogs as it can infect them very easily. Yes recovery is not always guaranteed.