Epidemiology

No racial or gender predilection exists for adults. However, children are twice as likely as adults to develop periorbital and orbital cellulitis. In children, males are twice as likely to develop the condition as females.[1][2]​ Periorbital cellulitis is more common than orbital cellulitis.[3]​ Before the routine use of Haemophilus influenzae type b (Hib) vaccination, the incidence of periorbital cellulitis associated with Hib bacteremia was reported to be as high as 80%.[4] Since the introduction of the Hib vaccination, this is extremely rare.[4]​ Orbital cellulitis is more common in winter months worldwide because of the increased risk of sinusitis.[5]​ Estimates of incidence of orbital cellulitis in children range from 1.6 to 9.29 per 100,000 population depending on setting.[6][7][8]​​

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