Getting a New Puppy While Having One With Parvo?

I need advice. I recently bought a puppy the day it was born on 3/6/16. I also found another puppy who was 10 to 12 weeks old, and adopted her; thinking it would be wonderful to have them grow up together. The 2nd puppy is now in the hospital fighting for her life against parvo. We've only had her a week. She's been in the hospital almost a week.

We are expected to pick up the new puppy around the end of April. I already paid for the first puppy and can't get my money back. If I thoroughly clean and beg the breeder to keep the puppy through the second set of shots are we safe? The newborn is a Boxer and the parvo puppy is a Staffordshire Terrier.