Precautions after polio vaccination: First, be on site for at least half an hour after the vaccine is administered. The second is to observe the baby’s body temperature because it is a live vaccine and individual children may develop a low to moderate fever 46 hours after vaccination. Thirdly, the vaccination should be given at least one month apart from other vaccinations. Fourthly, if the vaccine is given orally, because polio is given orally and also by injection. If vomiting occurs after the oral dose, it is necessary to give a new oral dose to replenish it. The other thing is that in the process of taking, if it is an injection, you should pay attention to whether there is a local hard knot. If there is a local hard knot, you can take a warm towel and give a local hot compress. If it is taken orally, avoid using hot water and use cool boiled water to take it orally. In addition, there is attention to whether the baby is allergic, whether there is epilepsy these diseases, if so, these should be used with caution or not.