Separating Puppy Recovering from Parvo from Other Dog?

We just bought two puppies from the same breeder about a month ago and they were perfectly healthy until about a week and a half ago when one of the puppies became very sick with vomiting and diarrhoea. The vet originally thought it was gastro so we kept him at home with our other puppy and they were in very close contact all the time whilst he was sick, eating from the same bowl, etc.

However after about a week our sick puppy was not getting any better so we took him to the vet and they confirmed it was parvo. However they thought it was highly unusual that our other pup did not get parvo from him, so they kept him at the vet's from then on for about 6 nights. We just brought him home tonight.

The vet thinks we should separate both puppies for the next month so we have our recovering pup in the laundry all by himself and he won't be coming out for the month because we can't risk our other puppy getting sick. Should we be bothering? Wouldn't our healthy pup already be sick, having been exposed for over a week to his illness plus being in the area in which he slept and went to the toilet frequently? He is still not showing any symptoms after over 2 weeks.

I am very worried about the adaption process that our sick pup is missing out on because I feel as though a month locked away in a laundry with no one being able to play with him or cuddle him is very bad!

By Madison