Table 1 Epidemiological parameters

Vaccine coverage

Fixed

70% (30%, 50%, 100%)

[33,34,35,36,37]

1/ρ_V

Mean duration of protection after birth (from vaccination) in days

Calculated based on number of days of mother’s immunity remaining at birth

90 (182, 230) days. See text for explanation.

[9, 10]

1/ρ_I

Mean duration of protection after birth (from infection) in days

Calculated based on number of days of mother’s immunity remaining at birth

90 (182, 230) days. See text for explanation.

a_V

Reduced susceptibility to infection in infant from mother having been vaccinated

Fixed + sensitivity analysis

0.4 (0.2, 0.6)

a_I

Reduced susceptibility to infection in infant from mother having been infected

Fixed + sensitivity analysis

0.4 (0.2, 0.6)

[17]

1/σ

Latent period (days)

Gamma distribution, shape parameter 3

4

[38, 39]

1/γ

Infectious period (days)

Gamma distribution, shape parameter 3

9

[39, 40]

1/ν_I

Duration of immunity following infection

Gamma distribution, shape parameter 3

Mean 230 days (182, 364)

[41]

1/ν_V

Duration of immunity following vaccination

Gamma distribution, shape parameter 3

Mean 230 days (182, 364)

ω

Reduced infectiousness in individuals aged 10 years and over

Calibration

0.2

See text

q

Community transmission coefficient

Calibration

0.015

See text

q_h

Household transmission coefficient

Calibration

2.4

See text

b₁

Amplitude of seasonal forcing

Fixed

0.397

[17]