لماذا قلّ التهاب لسان المزمار عند الأطفال كثيراً في العقود الأخيرة؟

Why has childhood epiglottitis become much less common in recent decades?

1. Because of annual flu vaccination
2. Because childhood asthma has fallen
3. Because of widespread antibiotic use
4. Because of the Hib vaccine

Answer: D) Because of the Hib vaccine. Routine Hib vaccination has dramatically reduced childhood epiglottitis; it is now seen more in adults or unvaccinated children.