Dr Madiha Tahir, Dr Sana Mushtaq, Dr Ahmad Hassan,.
Respiratory tract infection can be characterized as upper respiratory tract infection and lower respiratory tract infection. Respiratory tract infection is fatal. Influenza a virus plays a vital role in causing severe respiratory tract infection. Rhinovirus, human adenovirus (HAdV), respiratory syncytial virus (RSV), and human metapneumovirus (hMPV) are noninfluenza viruses which couldn’t be ignored in severe respiratory infections.