Infectious illness during the first year of life.
D000367:Age Factors; D003141:Communicable Diseases / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007224:Infant Care; D009518:New York; D010033:Otitis Media / Q000453:epidemiology; D011446:Prospective Studies; D012141:Respiratory Tract Infections / Q000453:epidemiology; D012621:Seasons