Table 1. Model parameters.

			High	Middle	Low	Symbol
Duration of maternal immunity (weeks) [21], [29]			13	13	26	1/µ
Life expectancy (years)			80	75	60	1/d
Duration of infectiousness (days) [23]			7	7	7	1/γ
Relative risk of infection following
	First infection		0.62	0.62	0.61	α 1
	Second infection		0.37	0.37	0.48	α 2
	Third infection		0.37	0.37	0.33	α 3
Proportion of infections with any GE (severe GE)
	First infection		0.47 (0.28)	0.47 (0.28)	0.30 (0.17)	ξ 1 (φ 1)
	Second infection		0.24 (0.19)	0.24 (0.19)	0.28 (0.23)	ξ 2 (φ 2)
	Third infection		0.32 (0)	0.32 (0)	0.18 (0.24)	ξ 3 (φ 3)
	Fourth infection		0.20 (0)	0.20 (0)	0.21 (0.18)	ξ 4 (φ 4)
	Source		[24]	[24]	[25]
Proportion who seroconvert to vaccination [27]			0.86 (0.67 to 0.98)	0.74 (0.63 to 0.86)	0.63 (0.58 to 0.67)	c
Infectivity parameter*		Fitted	0.235781	0.604687	2.25781	q

^*The infectivity parameter q represents the proportion of infectious contacts (i.e. when a susceptible and infectious individual come into contact) that result in transmission, multiplied by a constant factor by which the contact rate is assumed to scale across settings.