Update: influenza-associated deaths reported among children aged <18 years--United States, 2003-04 influenza season.

During the 2003-04 influenza season, CDC has received reports from state health departments regarding deaths among children with evidence of influenza virus infection. To help investigate these deaths, CDC has requested that all influenza-associated deaths among children aged <18 years be reported to CDC through state and local health departments during the 2003-04 season. This summary is based on preliminary data reported from 31 states as of January 6, 2004, and updates a previous report published in MMWR.