Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . There is subtle asymmetric opacity in the left mid lung best seen on the frontal projection which is new from prior exam and concerning for pneumonia . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Vague opacity in the left mid lung is concerning for pneumonia . Followup to resolution is advised .