Stock Photo - The biologist and mosquito scientist Hanna Jöst looks for mosquito species with a lamp in a vaulted cellar in Weinheim, Germany, 18 February 2013. The common gnat is supposed to be the vector of an african virus which killed numerous birds. Photo: Uwe Anspach | usage worldwide. - Weinheim/Baden-Wuerttemberg/Germany

Stock Photo: The biologist and mosquito scientist Hanna Jöst looks for mosquito species with a lamp in a vaulted cellar in Weinheim, Germany, 18 February 2013.

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