Microbiology Virology a4adb7fe Most common cause of viral pneumonia in infant is - A Rhinovirus B RSV C Reovirus D CMV High-Yield Explanation RSV can lead to tracheobronchitis,bronchiolitis and pneumonia. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:510,511