Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are appropriate . There is increased hazy opacification of the left mid lung zone compared to the right , which likely corresponds to the left upper lobe on the corresponding lateral view and is concerning for developing infection . No pleural effusion or pneumothorax is detected . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The trachea is midline . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Hazy opacification of the left lung compared to the right concerning for developing infection .