My Son's XRay Show Minimal Bilateral Increase In Bronchovascular Markings

My son's XRay show Minimal Bilateral increase in Bronchovascular Markings - Bronchiolitis. His previous XRay (taken 13 days back) showed Haziness in Right Perihilar Region due to Infective Etiology. He was under Augpen treatment for 7 days followed by Clarithromycin (125 mg) for 5 days. The current XRay was taken after Clarithromycin treatment. Please suggest if this is something to worry about.