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Scientists working to safeguard south-east Queensland from mosquitoes carrying the dangerous dengue and Zika viruses have developed a new trick they hope will revolutionise their efforts.The mosquito in question is common in much of the state's north, where emergency responses to dengue outbreaks are an annual occurrence.An Aedes aegypti mosquito. Photo: Jim Damaske/Tampa Bay Times via APThere's been little sign of the disease magnet in the south-east corner outside of Brisbane airport since th …

Zika fears prompted US health authorities yesterday to issue a travel warning for a small section of Miami where local mosquitoes have spread the virus to 14 people, officials said."We advise pregnant women to avoid travel to this area," said Centers for Disease Control and Prevention chief Tom Frieden, noting that the virus can cause the birth defect microcephaly.The area to avoid is inside a 1.6km section north of downtown Miami, a popular arts and restaurant district known as Wynwood.Women wh …