Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to ___ chest radiograph , there is interval worsening of the hazy ill - defined bilateral opacities in the left mid to lower lung an right lower lung . No pleural effusions are seen . The mediastinal , hilar , and pleural surfaces are normal . The heart size is top - normal . No pulmonary vascular congestion or pulmonary edema .
    OUTPUT:
    
1 . Interval worsening of bilateral hazy opacities , particularly on the left side , since ___ .