Question
What common side effects might arise if a 9-month-old child is accidentally injected with a triple dose of meningococcal vaccine? What should be done if adverse reactions occur?
Answer
After vaccination, children may experience side effects such as fainting, systemic reactions, regional reactions, and allergic reactions. If fainting occurs, the child should be immediately placed in a supine position with the head lowered, and sugar water should be administered. If the body temperature rises above 39°C, appropriate measures should be taken to cool down. For symptoms such as abdominal pain and vomiting, close observation and rest are required; recovery is usually expected within 1-2 days. Regional redness, swelling, and pain generally do not require special treatment. In rare cases, anaphylactic shock may occur, and immediate first aid is necessary. The above information is provided for your reference.