Engineering Mosquitoes to Fight Disease

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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?