It is very common to have a fever the day after the vaccination, which is related to the vaccine and the baby’s condition, but not to the imported or domestic vaccine. Parents should not worry too much if their child has a fever after a vaccination, but should let the child rest properly and observe the symptoms, the pattern of attacks and the progress. Fever caused by vaccination will not last more than 1 day and the fever will not exceed 38.5 degrees Celsius.