Engineering Mosquitoes to Fight Disease

Brazil is flooded with soccer teams and fans during the 2014 World Cup, but there’s another new visitor likely to go unnoticed to most football revelers: a genetically engineered mosquito. Scientists hope the bug will help curb the spread of the Dengue fever, a virus that has seen a five-fold incident increase over the last decade in the Americas. But what are the ethical dilemmas involved in releasing a new, engineered bug into a population?