In recent months, millions of Aedes aegypti mosquitoes have been at work spreading the Zika virus in South and Central America. This summer, millions more, all capable of conveying the virus, will flit and bite throughout the southern U.S. Congress just approved funding to battle its spread. This is not the first time a mosquito-borne virus has broken loose in the Americas and it will not likely be the last. Indeed, mosquitoes and viruses have shaped the history of our …