NEED HELP!

well i found her in our shed laying down in a puddle of drool so i picked her up and tried to give her some feed out of my hand and she didnt eat so then i knew something was wrong and i got info on how to treat her from different reliable sources and at first i didnt think it was parvo because i had her in a plastic box inside the house and she got up out of it and walked and would look at me when i called her name but shortly after that i knew her fate was sealed because she couldnt keep down more than 1cc of pedialyte and then the blood came and then it was over.............i was wondering how long the virus can stay dormant because i havent seen any signs of the virus in any of my other dogs and they have all had their shots except for one who is on his second dose of the parvo shot.....i guess what i am asking is if i am in the safe zone?