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(In other words, the importance of the physical barrier effect of ITNs decreases relative to the positive externality effect of the nets in creating a mosquito-free environment when ITNs are highly concentrated in one residential cluster or community.) Standard ITNs must be replaced or re-treated with insecticide after six washes and, therefore, are not seen as a convenient, effective long-term solution to the malaria problem
Solid split rings
Both the early and late boxes can be seen in the last two photos
For the 8.5:1, for every time the handle turns once, the spool will have turned 8.5 times
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