Catching a mosquito-borne infectious disease is a considerable risk in South America, as this malaria hotspot map clearly shows.
Despite being suitably impressed by the disciplined self-control of mosquitoes for not crossing international borders into Argentina and Chile, I intend to protect myself from getting bitten by using a combination of repellant spray and a net during my entire time in South America.
Both my DEET and LIFESYSTEMS Ultra Mosquito net arrived in the post today from Amazon, so I now just need to order my Malarone anti-malarial tablets over the Internet and then I will be ready to take on all-comers from the South American insect world.