It is not recommended to administer vaccines during a feverish period. It is advisable to wait until the child has fully recovered and at least a month after the fever subsides before scheduling vaccination. Vaccines contain live bacteria, and if administered when the child is not in optimal health, they may cause stronger reactions, such as fever in about 90% of children after the DTP vaccine. During the feverish period, it is important to closely monitor the child’s body temperature and provide light meals, encouraging them to drink plenty of water.