<prompt> Most common cause of viral pneumonia in infant is-Influenza virusAdenovirusRhinovirusParainfluenza virus  <response>: Ans. is a i.e., Influenza virus The peak attack for viral pneumonia is between the age of 2nd and 3rd years and decrease thereafter. Viruses causing pneumonia are - RSV - Most common Influenza - 2nd most common Adenovirus Parainfluenza virus Rhinovirus Most common bacterial cause of pediatric pneumonia is streptococus pneumoniae pneumococcus. Bacteria causing atypical pneumonia commonly are mycoplasma and chlamydia. 