Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse bilateral ground - glass opacities , new from prior exam . There is no pleural effusion . The heart size is top normal but unchanged from prior . The mediastinal silhouette is normal , however , there is thickening of the right paratracheal stripe .
    OUTPUT:
    
Bilateral ground - glass opacities are likely infectious in etiology . Enlargement of the paratracheal stripe is likely reactive , however , follow up to ensure resolution is recommended once symptomatology has resolved .