Table 4.

Human exposure patterns to Anopheles gambiae s.l. bites by season

Indicator	Dry season	Rainy season
Exposure for an unprotected individual
Percentage of vector bites occurring indoors for an unprotected individual (${\pi }_{I,u}$)	79%	75%
Percentage of vector bites occurring while asleep indoors for an unprotected individual (${\pi }_{S,u}$)	68%	68%
Exposure prevented by ITN use
Percentage of all vector bites prevented by using an ITN ($P_S^{\ast }$)	66%	66%
Remaining exposure for an ITN-user
Percentage of remaining exposure occurring indoors (${\pi }_{l,p}$) and (outdoors) (${\pi }_{O,p}$) for a protected user of an ITN	39% (61%)	27% (73%)
Population mean exposure based on observed level of net use
Population-wide mean personal protection against biting exposure provided by observed level of ITN use $P_{S,C_h}^{\ast }$	39%	42%