Clinical Research Directory

Inclusion Criteria: * • All children more than 1 month and less than 18 years of age * All cases presented by picture of recurrent pneumonia in the form of as at least two episodes of pneumonia in one year or three episodes ever, with radiographic clearing of densities in between. Exclusion Criteria: * • All children less than 1 month and more than 18 years * Evidence of malignancies * Evidence of congenital immune deficiency * Cases refusing to participate in research. * Cases missed for follow up.