Question
A five-year-old child has experienced leg weakness after receiving the MMR vaccine. The parent wants to know if this is related to the vaccine, and if not, what other conditions usually cause leg weakness, and how it should be treated.
Answer
Leg weakness that occurs after vaccination should be considered as a possible side effect of the preventive vaccination. This situation is usually a normal reaction, and if it is not accompanied by severe symptoms such as high fever, there is no need to worry excessively, and no special treatment is generally required. It is recommended to maintain a calm attitude, closely observe the child’s condition, and provide balanced nutrition through a diet, appropriately adding nutritious complementary foods to enhance resistance and prevent colds. If symptoms persist or worsen, medical attention should be sought promptly.