DEET losing efectiveness in mosquitoe endemic regions, Latin America

telegraph.co.uk reported that people living or travelling in areas plagued by mosquitoes are more at risk of bites after researchers found the insects are first deterred by Deet, but then later ignore it.
Deet, which was developed by the US military following operations in the jungle during World War II, is one of the most widely used ingredients in insect repellents. But scientists said they needed to find alternatives to the substance, which works because mosquitoes do not like the smell, after tests showed the insects are becoming increasingly resistant to Deet. Read Article
DEET losing efectiveness in mosquitoe endemic regions, Latin America