Abstract：
:To investigate the 1918/19 influenza pandemic daily number of new hospitalizations in the only hospital in Florence (Central Italy) were analyzed. In order to describe the transmission dynamics of the 1918/1919 pandemic influenza a compartmental epidemic model was used. Model simulations show a high level of agreement with the observed epidemic data. By assuming both latent and infectious period equal to 1.5 days, the estimated basic reproduction number was R(0)(1) = 1.03 (95% CI: 1.00-1.08) during the summer wave and R(0)(2) = 1.38 (95% CI: 1.32-1.48) during the fall wave. Varying the length of the generation time or the estimation method, R(0)(2) ranges from 1.32 to 1.71. The hospitalization rate was found significantly different between summer and fall waves. Notably, the estimated basic reproductive numbers are lower compared to those observed in other countries, while the age distribution of deaths resulted to be consistent with the patterns generally observed during of the 1918-1919 pandemic. Our knowledge on past pandemics, as for the 1918-19 Spanish influenza, would help improving mathematical modeling accuracy and understanding the mechanisms underlying the dynamics of future pandemics.
journal_name
Vaccinejournal_title
Vaccineauthors
Rizzo C,Ajelli M,Merler S,Pugliese A,Barbetta I,Salmaso S,Manfredi Pdoi
10.1016/j.vaccine.2011.02.049subject
Has Abstractpub_date
2011-07-22 00:00:00pages
B27-32eissn
0264-410Xissn
1873-2518pii
S0264-410X(11)00284-2journal_volume
29 Suppl 2pub_type
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