Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate mild interval improvement of bilateral infrahilar interstitial edema versus atypical pneumonia . Trace effusions persist bilaterally . There is no pneumothorax . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Mild improvement of bibasilar interstitial opacities right greater than left . Followup to resolution is recommended .