While, historically, young children were mostly affected, it is now more common among older children and adults. Before Hemophilus influenzae (Hib) immunization children of two to four were most commonly affected. With immunization about 1.3 per 100,000 children are affected a year.
Epiglottitis
Pharyngitis
Adenoiditis
Croup
Nasal vestibulitis
Laryngitis
Parapharyngeal abscess
Streptococcal pharyngitis