The clinical way to diagnose whether a dog is infected with parvovirus mainly includes test strips or PCR examination, combined with the dog's clinical symptoms. It is recommended to consult a professional pet doctor.
Pet News
If a dog only vomits but does not poop, does it mean it is small?

Parvovirus mainly affects young dogs, or dogs that have not been vaccinated against infectious diseases. Clinical symptoms include vomiting and diarrhea. However, if the dog only shows symptoms of vomiting, it may also be caused by parvovirus infection, which is related to the disease. Dependent on the period of infection.