Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate air is increased opacification of the left mid lung field , which is concerning for left lower lobe pneumonia . Additionally there is a subtle increased opacity within the right mid lungfield , which may represent a second site of infection . There is a small left - sided pleural effusion . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax .
    OUTPUT:
    
1 . Increased opacification of the left mid lung field , which is concerning for left lower lobe pneumonia . Additionally there is a subtle increased opacity within the right mid lungfield , which may represent a second site of infection . 2 . Small left - sided pleural effusion .