Was Zika outbreak caused by release of genetically modified mosquitoes in Brazil?

The genetically engineered insects were designed to stop the spread of dengue fever but critics now fear the programme may have had a deadly consequence.

The Zika virus outbreak currently gripping the Americas could have been sparked by the release of genetically modified mosquitoes in 2012, critics say.

The insects were engineered by biotechnology experts to combat the spread of dengue fever and other diseases and released into the general population of Brazil in 2012.

But with the World Health Organisation(WHO) now meeting in Geneva to desperately discuss cures for the Zika virus, speculation has mounted as to the cause of this sudden outbreak.

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