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30 July 2009 @ 10:36 pm
Mosquitoes deliver malaria 'vaccine' through bites  
By MARILYNN MARCHIONE, AP Medical Writer Marilynn Marchione, Ap Medical Writer Wed Jul 29, 7:46 pm ET

In a daring experiment in Europe, scientists used mosquitoes as flying needles to deliver a "vaccine" of live malaria parasites through their bites. The results were astounding: Everyone in the vaccine group acquired immunity to malaria; everyone in a non-vaccinated comparison group did not, and developed malaria when exposed to the parasites later.

The study was only a small proof-of-principle test, and its approach is not practical on a large scale. However, it shows that scientists may finally be on the right track to developing an effective vaccine against one of mankind's top killers. A vaccine that uses modified live parasites just entered human testing.

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