... acute respiratory infectionsARIsmaybeclassifiedintoupper(AURI)andlower(ALRI) acute r espiratory infections, depending on themain organs affected (nose, sinuses, middle ear, larynxand pharynx ... one fourth to one half of childhood pneumonia cases appear to have a primarily viral aeti ologic agent, including human respiratory syncytial virus (RSV), parainfluenza and influenza viruses [12,17]. ... Boschi-Pinto C, Bryce J, Dye C: Estimates of world-wide distribution of child deaths from acute respiratory infections.Lancet Infect Dis 2002, 2(1):25-32.11. Bryce J, Boschi-Pinto C, Shibuya K,...