Children should not be vaccinated during a cold. Because the vaccine is supposed to be an attenuated pathogenic microorganism, there are a lot of problems if it is administered during a cold. First, the vaccine itself can have some side effects that can produce fever, fatigue and rash. This time of the year may further aggravate your child’s cold and is not conducive to healing. Second, when you are sick, your child’s resistance will drop. If the child is vaccinated at this time, it is not easy to stimulate the body to produce enough antibodies, which will affect the effectiveness of the vaccination. Therefore, it is not possible to vaccinate during a cold. You should wait until your child has recovered from the cold before vaccinating. Slightly delaying the vaccination for a few days will have no effect on your child’s health and will be more effective.