A viral infection typically affecting infants which results in wheezing which may not respond to beta-agonists.
Typically affects children less than 2 years of age. It is viral, possible fever, gradual onset, no drooling is noted.
Typically affects children greater than 2 years of age. It is bacterial, with fever, rapid onset, possible stridor, patient wants to sit up to keep airway open, drooling is common. Airway manipulation may worsen the condition.