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Science 5 March 2004:
Vol. 303. no. 5663, p. 1451
DOI: 10.1126/science.303.5663.1451a
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News of the Week

GENETICS:
Hybrid Mosquitoes Suspected in West Nile Virus Spread

Jennifer Couzin

On page 1535, genetic analyses of mosquitoes from five continents suggest a controversial explanation for why there have been few human outbreaks of West Nile virus in Europe: U.S. mosquitoes that transmit the virus may be hybrids of two strains.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)