chapter  16
Transmission of, and protection against, influenza: epidemiologic observations beginning with the 1918 pandemic and their implications
Pages 11

Source: S.C. Schoenbaum, M.T. Coleman, W.R. Dowdle and S.R. Mostow, 'Epidemiology of influenza in the elderly: Evidence of virus recycling', American Journal of Epidemiology, vol. 103, 1976, pp. 166-73. Reproduced here permission of Oxford University Press.