Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged . Ill - defined increased opacities in the lower lobes left greater than right consistent with pneumonia . If any there is a small left effusion . There is no pneumothorax or right pleural effusion . The osseous structures are unremarkable
    OUTPUT:
    
multifocal pneumonia given the distribution could be viral or atypical