Table 4. Sensitivity analysis on seasonal forcing.

Seasonal forcing A	Household size	Non-pandemic (% of Total)	% point difference of within-house attack rate in pandemic and non-pandemic years (i.e Pandemic attack rate - Non-pandemic attack rate)
0.015625	1	0	0
(1/ω = 3.4 years)	2	24.0	1.48
	3	30.0	1.47
	4	33.1	1.37
	5	35.1	1.27
	All	30.0	1.32
0.03125	1	0	0
(1/ω = 2.5 years)	2	24.0	1.50
	3	30.0	1.50
	4	33.1	1.40
	5	35.1	1.20
	All	30.0	1.30
0.0625	1	0	0
(1/ω = 1.4 years)	2	24.1	1.32
	3	30.1	1.31
	4	33.2	1.22
	5	35.2	1.13
	All	30.0	1.28