SANOFI-AVENTIS SA., the biggest supplier of influenza shots to the
U.S., signed an exclusive agreement with U.K. vaccine maker Acambis Plc
to develop and market a product to fight the deadly West Nile virus.
Acambis will receive $10 million now, and as much as $70 million more
linked to the product's development and introduction. Sanofi said
there is no preventive shot or treatment available for West Nile disease, a potentially fatal virus that has become endemic in the U.S.
since it was first detected there in 1999. The experimental vaccine,
which is in the second of three sets of tests for approval, helped more
than 98% of the volunteers in studies develop antibodies against the