I took my pup to the park on the weekend for a short time (10 minutes) because we cant leave her home alone while we walk out other dog. she sits at home and squeels REALLY LOUD! I didnt even know what parvo was or what it did till another dog owner explained it to me down there. So i quickly took her home and straight to the backyard! The fast facts i found are puppies are most vulnerable (some breeds more than others), dont take out in public until 7-10 days after 3rd vaccination (some debate this), lives in soil for up to 7 months, water and bleach kill it,most common symptoms are vomiting, and stinky stinky dhirrohea, and last but not least parvo is a dog owners worst nightmare
p.s sorry to hear about your loss and i hopefully you can get another puppy really soon