The symptoms of the dog after vaccination frightened me.

My dog vomited the day after the first injection. You must be in a healthy state when you inject with your dog. . Because the vaccine is a virus in this province, it should be injected when the dog is healthy. What your dog said is the first, probably the side effect of the vaccine. Don't worry too much about observing it for a day. Go to the pet hospital. Second, the dog itself is sick. The owner doesn't think it necessary to take the dog for an injection. See a doctor at once. Third, the vaccine is unqualified or expired. Fourth, dogs that go to pet hospitals are generally sick dogs. There are bacteria on the table and floor of the pet hospital, including the diagnosis desk, so be sure to bring a lot of newspapers when you take your dog to the doctor. You must always hold the dog in your arms. If you have to put it on the diagnostic table or the floor, you must spread the newspaper and put it on the dog. . .