Vaccinations for dogs generally start when they are over six weeks old. The main reason is that when the puppies are fed breast milk during their childhood, the puppies have maternal antibodies in their bodies, which can resist viruses and other harmful factors in the external environment. The vaccine may not be effective at this time, so it is generally injected when the dog is over six weeks old, and the optimal interval between vaccine injections for dogs is 21 days, and should not exceed 28 days at the latest, otherwise the vaccine effect will be affected.

Precautions for dog vaccination:

1. The dog should be kept in the hospital for observation for 30 minutes after injection. If the dog develops edema, rash, or difficulty breathing, If symptoms occur, inform the doctor promptly to inject anti-allergic injections.

2. Dogs can be vaccinated only if they are healthy, have no viral, bacterial infection or trauma or other diseases, and are not pregnant.

3. It is not advisable to take a bath before and after vaccination, nor to exercise strenuously after vaccination to prevent pinhole infection and reduce immune effect.