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. 2005 Sep;11(9):1355–1362. doi: 10.3201/eid1109.041344

Table 3. Parameters required for scenario specific simulations.

Baseline 1957 1968 1918 1st wave 1918 2nd wave 1918 3rd wave
Overall hospitalization rate per 100,000 population 138* 188† 144†
Overall clinical attack rate, % 25† 31† 21‡ 9%§
Overall serologic attack rate, % 50‡ 67‡ 65§ 79§ 61§ 69§
% immune at start of wave 15‡
R0 1.39‡ 1.65‡ 2.2‡ 2.00† 1.55‡ 1.70‡
Case-fatality rate, % 0.70† 3.25† 2.70†

*Derived from model simulations.
†Reported values.
‡Calculated directly from data.
§Calculated by fitting the model to data.
¶Assumed values.