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Table 4 Human exposure patterns to Anopheles gambiae s.l. bites by season

From: Patterns of human exposure to malaria vectors in Zanzibar and implications for malaria elimination efforts

IndicatorDry seasonRainy 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 (\(P_{S}^{*}\))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 ITN39% (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 \(P_{{S,C_{h} }}^{*}\)39%42%