The reasons why the dog’s vaccination does not work:

1. Failure to follow the doctor’s instructions for supplementation: if it has not been given for more than a year, of course there is still a possibility of infection , because the vaccine effect only lasts for one year.

2. There are latent or concurrent infections.

3. Poor health: For example, if parasites are not removed, especially in summer, dogs can easily be infected with parasites such as fleas and lice, so dogs must be dewormed, such as Wear a Sarkin dog flea, tick and insect repellent collar for dogs.

4. Wrong timing of injection: Mostly it is too early. If injected when there are still a lot of transitional antibodies, part of the antigen will be offset, and of course the function that can be produced will be greatly reduced.

5. The dog’s own immune system is not perfect.

6. When you have other emergencies or are taking certain drugs.

Dogs that are vaccinated on time are generally less likely to develop major or minor illnesses, because their immune system is always on alert, so other pathogens are less likely to cause trouble.