A genetically engineered mosquito that vaccinates as it bites has been developed by Japanese scientists. A protein in its saliva protects against potentially fatal Leishmania, which is spread by sand flies. Although there is no known vaccine for malaria, which kills around 2million people a year, it is hoped it can eventually applied to that too.
http://e-edition.metroherald.ie/2010/03/19/ - p8.
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