"Parvovirus is a virus that survives a long time in the environment and is very hard to kill. It can survive for several years in certain environments. Most regular household cleaners do not kill this virus.
Anywhere that a dog infected with parvovirus has been should be considered contaminated. This includes
footwear and clothing worn by people who have handled the dog while it is sick. Generally if a dog has been in your house any room the dog has been in should be considered contaminated, any room the dogs bedding has been in should be considered contaminated and if the dog has been in the yard the entire yard should be considered contaminated. Before using any cleaners any faeces (poo) should be collected, double bagged and thrown out. Anything contaminated that can be thrown away and replaced should be. The best household cleaner to use to kill parvovirus is bleach (1 part bleach to 30 parts water). It should be used on hard surfaces including tiles, concrete, paving bottoms of shoes etc – leave the bleach on the surface at least 10-15 minutes. Anything that can be washed in bleach should be. A veterinary cleaner called F10 can be supplied in a spray bottle and used on items that cannot be cleaned with bleach.
Contaminated carpet, soft furnishings and clothing/bedding should be cleaned thoroughly using a colour-safe bleach solution if possible (test it first in case it discolours the material). Soak clothing/bedding in the bleach first. Steam cleaning can also be effective if temperatures reach 120-130 degrees Celsius for 10-15 minutes.
Hanging things out in the hot sun to dry can also assist in killing off any remaining virus. Ultimately anything that is not a hard object/surface will be difficult to clean adequately.
Once areas such as lawn or dirt have been contaminated with parvovirus they are practically impossible to adequately clean and unvaccinated dogs should not be allowed in these areas for years after a sick dog has been on them. This means any future puppies should not be allowed in the yard until 2 weeks after their last puppy
vaccination."