A low fever in a child after a leprosy vaccination is a normal immune response and not a decrease in resistance as some people misinterpret. In fact, a fever is, from the other side, an indication of a better responsiveness of the vaccinated subject to the vaccine. After a child is vaccinated, the fever usually does not last longer than 3 days. Therefore, after 3 days of vaccination, it will gradually return to normal and parents only need to enhance care and observation without excessive worry. After vaccination, some fevers are normal, while others are coincidental, which parents need to judge. If it is normal, the body temperature will be between 37°C and 38°C and will not be accompanied by general discomfort. Usually, the fever will come on the day of vaccination or the next day, and the fever will last for a relatively short period of time, and will be relieved within 1-2 days. In case of coincidental phenomenon, the body temperature may reach 38.5℃, accompanied by symptoms such as runny nose, sneezing and coughing in addition to fever. As normal, it may be feverish on the day of vaccination or the next day, but it lasts longer and the fever will continue and some will gradually increase if not treated in time. What should parents do if their child has a fever after receiving the leprosy vaccine? 1.After the leprosy vaccination, if the body temperature is below 38.5℃, you can take physical cooling methods to relieve the condition, you can choose to use antipyretic paste for treatment, which is convenient and safe, and the effect is also better. 2. If a child has a fever after vaccination, parents can give the child more warm boiled water. If the child is reluctant to drink water because he or she is uncomfortable, he or she can also try to drink some flavored vegetable soup or fruit juice to help relieve the fever symptoms. 3. If a child develops a fever after receiving the leprosy vaccine and the temperature is above 38.5℃, he or she should take some fever-reducing medicine in time. If it continues to exceed 38.5℃, parents need to take the child to a regular hospital in time for reasonable treatment and therapy under the guidance of a professional doctor.