Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is widespread heterogeneous opacification in each lung , but predominantly involving the right upper and left lower lobes . Interstitial opacities are widespread , but some areas are relatively spared such as the right lower and left upper lobes . A relatively confluent area of developing airspace disease is noted in the anterior segment of the right upper lobe . Bony structures are unremarkable . Allowing for differences in technique , there has been little if any change since the recent prior radiographs .
    OUTPUT:
    
Widespread interstitial and , to some extent , airspace disease with a pattern more suggestive of severe widespread infection than pulmonary edema ; clinical correlation is suggested .