Mosquitoes don't have very many redeeming qualities. They drink our blood, they make us itch and they carry illnesses like Zika, a virus that's exploding across Latin America. They can also do some serious economic damage. From health care expenses to productivity losses -- even harm done to quality of life -- the economic costs associated with mosquitoes add up. So shouldn't we get rid of them all? Tori discusses this and more with Don Shepard, a health economist at Brandeis University.