"A comprehensive analysis of 14 surveys in several countries with 14,196 households showed that that the overwhelming majority of nets were used for malaria prevention, and only 255 nets were repurposed (which make up less than 1% overall). Furthermore, the majority of the repurposed nets were already considered too torn, indicating they had already served out their useful life for malaria prevention[62]. The authors conclude that national programmes and donor agencies should remain confident in the appropriate use of bednets."
https://www.givingwhatwecan.org/post/2015/04/update-against-...
http://blog.givewell.org/2015/02/05/putting-the-problem-of-b...
Another analysis:
"A comprehensive analysis of 14 surveys in several countries with 14,196 households showed that that the overwhelming majority of nets were used for malaria prevention, and only 255 nets were repurposed (which make up less than 1% overall). Furthermore, the majority of the repurposed nets were already considered too torn, indicating they had already served out their useful life for malaria prevention[62]. The authors conclude that national programmes and donor agencies should remain confident in the appropriate use of bednets." https://www.givingwhatwecan.org/post/2015/04/update-against-...