(American Museum of Natural History) Researchers from the Sackler Institute for Comparative Genomics at the American Museum of Natural History sequenced the entire genetic code of 23 strains of Flavivirus, the virus that causes St. Louis encephalitis, to understand its evolutionary history. This study, published this month in Molecular Phylogenetics and Evolution, found that a single mutation made the virus pathogenic to humans and that the North and South American strains divided about 116 years ago.
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