The more iron in the blood, the fewer mosquitoes were infected - UConn Health immunologist Penghua Wang They then pass it on to the non-infected individuals when they feed on the latter for their next blood meal. The mosquitoes which spread dengue do so by feeding on blood from Dengue patients, by which means they contract the infection themselves. Research is constantly on to find ways in which this infection can be reduced. Dengue vaccines have been made but some scientists say it worsens the features of Dengue if used in a dengue-naïve individual. The worst spread of Dengue today is in cities, and the increasing number of cities in the tropics brings together two high-transmission scenarios. Image credit: Khlungcenter / Shutterstock
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