Under normal circumstances, the dog can be vaccinated when it is 45 days old and healthy one week after weaning. Dogs need three injections of infectious disease vaccines and one injection of rabies vaccine in the first year. The infectious disease vaccines are injected 21 days apart. As adults, dogs only need one annual injection of infectious disease and rabies vaccines.

Notes on dog vaccination:

1. Pay attention to antibody testing. After all dogs have been vaccinated, it is best for owners to take their dogs for antibody testing half a month later. A strong antibody titer indicates successful immunity, a weak antibody titer means the dog needs to be immunized more, and the absence of antibodies means the dog's previous immunity failed and the dog needs to be re-vaccinated.

2. New dogs should not be vaccinated. A new dog has just been bought home and needs to stay at home for about 15 days before going to the hospital for vaccination.

3. Pay attention to safety and effectiveness. Vaccinating dogs is for the sake of their health. At the same time, in order to ensure the safety and effectiveness of the vaccine, owners must take their dogs to a regular pet hospital for injections.