Annually, the incidence of<unk>  is approximately 532/100,000 individuals, peaking in the fall of each year.<unk>  is primarily found in children between 6 months and 6 years of age, but rare cases have been reported in children as young as 3 months and as old as 15 years. Males are 1.5 times more likely to develop<unk> .<unk>  is found more often in developing countries due to the larger proportion of children in the populations, as well as the higher proportion of malnutrition and vitamin deficiency.
Croup epidemiology and demographics
Laryngitis epidemiology and demographics
Pharyngitis epidemiology and demographics
Rhinitis epidemiology and demographics
Epiglottitis epidemiology and demographics
Strep throat epidemiology and demographics
Asthma epidemiology and demographics
Adenoiditis epidemiology and demographics