Table 5 Model parameters for the 2003/2004 influenza epidemic in Switzerland

Relative susceptibility

Individuals aged 20 or younger

100%

Individuals older than 20

50%

Vaccination

Vaccination efficacy

80%

Doses

1.31 million

Severity of infection (frequency)

Severe and moderate cases

50%

Mild and asymptomatic cases

50%

Course of infection

Incubation period

1 day

Infectious period

7 days

Relative and absolute infectiousness

Severe and moderate cases

100%

Mild and asymptomatic cases

50%

Relative infectiousness over time

lognormal decay with δ[log(d)]= -0.72 and γ[log(d)]= -1.8

Absolute per-contact infection probability (averaged over infectious period and assuming 100% infectiousness and 100% susceptibility)

1.1693 10^-2