http://www.nothingbutnets.net/nets-save-lives/
In the poorest parts of the world, where effective window screens are lacking, insecticide-treated bed nets are arguably the most cost-effective way to prevent malaria transmission. One bed net costs just $10 to buy and deliver to individuals in need. One bed net can safely last a family for about four years, thanks to a long-lasting insecticide woven into the net fabric.
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