. CDC. Severe morbidity and mortality associated with influenza in children and young adults—Michigan, 2003. MMWR2003;52:837–40.
2.
. ThompsonWShayDWeintraubEBrammerLCoxNAndersonLJMortality associated with influenza and respiratory syncytial virus in the United States. JAMA2003;289:179–86.
3.
. GuarnerJShiehWJDawsonJSubbaraoKShawMFerebeeTImmunohistochemical and in situ hybridization studies of influenza A virus infection in human lungs. Am J Clin Path2000;114:227–33.