Andrew Hammond, a genetic engineer at Imperial College London, and his team have been genetically engineering mosquitoes, to prevent them from reproducing. They use a special technique called "gene drive", which allows an offspring to inherit the new trait with close the 100% efficiency. This new process quickly transforms a population to have the new, desirable trait. By using this technology, scientists can specifically sterilize the females carrying the disease, without affecting any others.   

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They use the CRISPR-cas9 technology to quickly alter the DNA.