According to the Centre for Disease Control in Atlanta, approximately 5% to 10% of all children under five years old in developing countries develop pneumonia each year and acute respiratory infections like pneumonia cause approximately two million deaths among children under five each year and are the leading cause of death in that age group. In addition to children, approximately 100 of every 100,000 adults are affected yearly and the elderly are at particular risk according to WHO information.
Selon le Centre for Disease Control, à Atlanta, chaque année, de 5 à 10 p. 100 des enfants de cinq ans et moins dans les pays en développement ont une pneumonie et quelque deux millions d'enfants de ce groupe d'âge succombent à des infections respiratoires aiguës telles que la pneumonie.