Sir,The recent publication on organizing pneumonia (OP) in swine flu is very interesting.[1] In fact, the pulmonary sequel of swine flu is an interesting concern in chest medicine.[23] Zanetti et al., raised an interesting issue on pulmonary fibrosis and OP and proposed that “The diagnosis of secondary OP after H1N1 infection is important because proper treatment of OP requires corticosteroid therapy.[1]” In fact, OP as a complication of swine flu is mentioned in many reports.[45] Ajlan et al., studied on radiographic and computed tomography (CT) findings of cases with swine flu and reported that “predominant peribronchovascular and subpleural distribution, resembling OP” is common.[4] This finding can be observed in both immunocompetent and immunocompromised host and it is “regardless of the timing of CT relative to the onset of symptoms”.[5] It is no doubt that lung complication of swine flu can be serious and it is extremely serious in cases with underlying lung fibrosis.[6]