FILE - In this Sept. 29, 2016 file photo, Aedes aegypti mosquitoes, responsible for transmitting Zika, sit in a petri dish at the Fiocruz Institute in Recife, Brazil. The Zika virus may not seem as big a threat as last summer but don't let your guard down, especially if you're pregnant.  While cases of the birth defect-causing virus have dropped sharply from last year's peak in parts of South America and the Caribbean, Zika hasn't disappeared and remains a threat for U.S. travelers. (AP Photo/Felipe Dana, File)
Once a mosquito becomes infected with Wolbachia, the bacteria outcompetes viruses, reducing the risk of deadly infections in humans. AP

The $19m mosquito factory set to breed billions of insects a year to tackle disease




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