Reasons for dogs getting sick after vaccination:

1. The dog was already sick when vaccinated, but it was in the incubation period and clinical symptoms had not yet appeared.

2. Infection with the virus before vaccination takes effect and causes illness. It is more reliable to inject hyperimmune serum (anti-canine distemper, parvovirus, etc.) before immunizing dogs that are prone to disease, especially young dogs, and then inject the vaccine 7-10 days later.

Precautions for vaccinating dogs:

1. After vaccination, try to avoid going out to prevent infection by external bacteria and viruses. During this period, the owner should Take better care of your dog.

2. Dogs cannot take a bath within 15 days after being vaccinated to avoid catching colds.

3. Do not change dog food, take medicine, change the environment, etc. immediately after vaccination to avoid stress reactions.