... Seasonal in uenza in adults and children: diagnosis, treatment, chemoprophylaxis, and institutional outbreak management: clinical practice guidelines of the Infectious Diseases Society of America Clin ... the American Thoracic Society, the Society for Hospital Medicine, and the Society of Critical Care Medicine The guidelines were reviewed and approved by the PIDS Clinical Affairs Committee, the ... severity of pneumonia and need for hospitalization The incidence of pneumonia and risk of severe pneumonia are greater in infants and young children The attack rates are 35 –40 per 1000 infants...