The reason why the dog’s parvovirus is detected three days after the vaccine is because the dog itself carries the parvovirus. After the vaccine, the dog’s resistance becomes worse and the vaccine has not yet formed antibodies, so it will become ill. At this time The dog needs to be treated promptly to avoid life-threatening injuries.

Tips:

It is best not to take the dog out before and after the dog is vaccinated, and do not bathe the dog to avoid contracting the virus.