Journal of Mosquito Research, 2026, Vol.16, No.1, 1-20 http://emtoscipublisher.com/index.php/jmr 5 Graph 1b Evolution of the weekly risks of receiving, in one month, an infective bite of the main vector of malaria in a house before, and after, installation of LLINs. (D= number of days) Graph 1c Evolution of the monthly risks of receiving, in one year, an infective bite of the main vector of malaria, in a house before, and after, installation of LLINs. (M= number of months) 3.1.1 Evolution of the weekly risk in one month In a house without LLIN the weekly risk sharply increased, 2% in one day; 13% in one week; 24% in two weeks; 33% in three weeks and 42% in four weeks. With installation of LLINs they were respectively reduced at < 1%; 6%; 11%; 16% and 21% meaning that LLIN conferred always a >50% reduction of risks during the month (Table 1a). Table 1a Evolution of the weekly risks, in one month, of getting an infective bite before, and after, full coverage in LLINs; with the difference of risks induced Before After Diff. D1 1.9 0.8 -57.1% D7 12.6 5.6 -55.6% D14 23.6 10.9 -54.0% D21 33,3 15.9 -52.3% D28 41.7 20.6 -50.6% 3.1.2 Evolution of the monthly risks in one year Before LLINs installation the risk of being infected was 44% in one month; reached 90% in four months; 97% in
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