My puppy had parvo virus. If I bring a fully vaccinated dog here, can it infect the new dog? Is there still a risk? Pet's info: Dog | Mixed Breed Medium | Male | 2 years old | 52 lbs | 100 lbs | 100 lbs

Parvovirus is unfortunately very persistent in the environment and can remain viable for a two years or more in organic material (like your yard). I recommend cleaning all surfaces and washing bedding that you can with dilute bleach (4 oz bleach to 1 gallon water). It would be best to bring home an adult, fully vaccinated dog. Antibodies from the mother circulate until a puppy is 15-20 weeks old, so vaccine boosters are given every 2-4 weeks during this time to try to catch the moment when antibody is no longer interfering. If a new puppy was brought into the environment it could be vulnerable even if the appropriate vaccines were given. Vaccine guidelines (very detailed) from the American Animal Hospital association are here: https://www.aaha.org/public_documents/professional/guidelines/caninevaccineguidelines.pdf

Bleach and water really are the best ways to get rid of the virus in your home, but the yard is almost impossible to treat for parvovirus. It is a safer pet to get a puppy that is already fully vaccinated if you have a yard that could have potentially been infected as well. Or keep the new puppy indoors until the new puppy is fully vaccinated. Best of luck with the new pup! Take care

I am so sorry to hear about your puppies. Parvo is an awful disease! It is definitely very risky to bring puppies (especially young puppies with no vaccinations) into a house where there recently has been parvo. Parvo virus can live in the environment for many, many months. It is important to use a dilute bleach solution to clean everything you possibly can in the house that had contact with the previous puppies- including the bottoms of your shoes and clothing/bedding that had contact with their diarrhea in particular, food and water bowls, patio and garage floors etc. parvo can live in the soil a very long time and since you cannot bleach these areas you need to keep the new puppies away from soil and grass that could have been contaminated by the sick puppies. If you do decide to risk bringing new puppies to the same home Be sure they are vaccinated appropriately right away. Good luck!

Can a new vaccinated dog get parvo in a previously infected home?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium | Male | 2 years old | 52 lbs | 100 lbs | 100 lbs

My puppy had parvo virus. If I bring a fully vaccinated dog here, can it infect the new dog? Is there still a risk?

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Answered By Sabina Snyder, Specialty Surgery Technician 51

Veterinary Technician

Published on November 20th, 2014

If they new dog is a year old and you are completely sure that that it is 100 percent vaccinated there is a very minimal risk that it will be infected. However, that being said, vaccines are never 100 percent effective so there is always a 0.09 percent chance that the new dog could get the virus. But you should be safe bringing the new dog home. I would make sure that the home environment has been cleaned as thoroughly as possible (this means with bleach to all surfaces) and make sure that the outdoor surfaces have been cleaned as well. Parvo can live in the environment for an annoyingly long time (up to 6 months) so it wouldn't hurt to apply a safe mixture of bleach product to your yard as well. This is probably going completely overboard, but you know how scary parvo can be!

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Can a new vaccinated dog get parvo in a previously infected home?

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