Throughout history, more soldiers have died from insects than from bullets or bombs, since insects like mosquitoes and lice can vector diseases such as malaria, yellow fever, or typhus.
To combat this, the US Army has been treating uniforms with permethrin, which repels mosquitoes, ticks, chiggers and flies. There are no known health risks associated with wearing the permethrin-treated uniforms, and the World Health Organization and the Centers for Disease Control and Prevention recommends wearing permethrin-treated clothing for disease prevention.
The following videos explain the importance of treated uniforms for combat soldiers, and show how the uniforms repel mosquitoes:
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