Parvovirus - Deadly disease!!!

My 3 puppies contracted this dreadful disease when they were 3 months old following a visit to the vet. I rescued them from a ship as newborns and they had 2 of three vaccinations. One of the sister had a mouth abscess and had to have 5 consecutive day visits to the vet for antibiotic injection. They put her on the floor and I later discovered they had cases of parvo in there. She started vomiting 5 days later and i rushed her to the vet and was diagnosed with parvo. 5 days and 6 days later the other two sisters developed vomiting. They were all in the hospital fighting for their lives. But my poor little baby that was the last to show symptoms survived 4 days and then i lost her. The other two survived. I had been so careful with them and cared for them from complete newborns. Yet one time they were put on the floor this happens. I see so many people at the vets and elsewhere putting their puppies down! I try and warn them but sometimes i think they think I am being paranoid. But words cannot describe how terrible this disease is. My babies were 14kg and went down to 9kg in 5 days!! they were so weak and ill. Yes I may see that 2 survived but i lost one and that is one too many! My advice to anyone is to PLEASE protect your puppies. Only needs a microscopic infected amount of this virus on your feet the dogs feet or elsewhere and they lick it and that could be your pet fighting for their life!!