Arch Otolaryngol
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To determine the incidence and characteristics of acute epiglottitis among children (< or = 19 years of age) and adults (> or = 20 years of age) before and after widespread conjugate Haemophilus influenzae type b vaccination for infants. ⋯ Acute epiglottitis practically vanished among young children in this population after conjugate H influenzae vaccination, but adult cases increased, the patient profile remaining the same.