Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there are new bilateral parenchymal opacities . Specifically there is focal consolidation lateral to the left hilum and silhouetting of the medial left hemidiaphragm with a retrocardiac opacity . Increased interstitial opacities are seen scattered throughout both lungs . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Diffuse bilateral parenchymal opacities with more confluent consolidation in the left lower lobe and left perihilar region . Infection would be of greatest concern given rapid interval development . Followup will be necessary to ensure resolution .