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Vi typhoid vaccine proves highly effective in young children
Date:7/22/2009

ogistically and programmatically possible. "The fact that the level of overall protection (57 percent) was similar to the adjusted level of total protection among vaccinees (61 percent), despite vaccine coverage of only about 60 percent of the subjects, underscores the importance of herd protection by the Vi vaccine," said Dr. Clemens, a co-author of the study. "It also suggests the need for consideration of herd protective effects in future deliberations about the use of this vaccine in developing countries."

Meanwhile, in a separate vaccine development project, IVI laboratories have more than tripled the manufacturing yield of Vi polysaccharide, which is expected to further reduce the vaccine's production cost, thus making it more accessible for developing countries. The production technology for the high-yield Vi polysaccharide is being transferred to high-quality producers in developing countries.


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Contact: Tae Kyung Byun
tkbyun@ivi.int
82-119-773-6071
International Vaccine Institute
Source:Eurekalert

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