Table 1. Sensitivity analysis of the fit statistic and fitted transmission parameters for varying duration of immunity and infectious period.

Test conducted	Parameter variation		Fitting parameters			Fit statistic (F)
	Parameter	Value tested	β0	β1	ν
Parameters for best fit: α = 0.65; δ = 0.65; γ = 1/1.4; σ = 1/0.57	-	-	1.9896	0.6495	0.0438	89.5751
Reduction in infectiousness for adults	α	0.5	2.5639	0.6775	0.0454	90.3653
	α	0.8	1.6300	0.6262	0.0436	89.6733
Reduction in susceptibility for adults	δ	0.5	2.5534	0.6279	0.0445	90.1470
	δ	0.8	1.6488	0.6667	0.0468	90.2240
Variation to latency period	1/σ	1/0.28	1.9113	0.5879	0.0474	90.0338
	1/σ	1/0.86	2.1255	0.6618	0.0457	92.3239
Variation to infectious period	1/γ	1/1.14	2.3617	0.6478	0.0464	91.6664
	1/γ	1/1.57	1.8289	0.6599	0.0428	90.2565

The assumed values of the parameters are α = 0.65; δ = 0.65; γ = 1/1.4; and σ = 1/0.57 unless otherwise varied, as indicated in the table.