Efficacy of Azithromycin Prophylaxis in Preventing Recurrent Acute Sinusitis in Children

Inclusion Criteria: * children between the age of 5 years and 15 years with the diagnosis of recurrent acute sinusitis who are attending the outpatient pediatric department, pediatric allergy clinic, and the ear, nose, throat clinic. Exclusion Criteria: * patients who have allergic rhinitis, chronic sinusitis, a history of allergic reactions to azithromycin or macrolides, treatments with immunotherapy or IVIG or gentamycin solution or pneumococcal vaccine during study period.