The incubation of the virus is 7-10 days before any sign are shown.
I have had a puppy test negative at a vets via the snap test and show symptoms the next day and be dead the next.
There are also different strains that will react differently to vaccines. They are the CPV1, CPV2 and variations CPV2a, CPV2b, CPV2c
There is also a human Parvovirus B19....But that is a different thread!
