Word: kawaoka
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Dates: during 1990-1999
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Webster assigned a young scientist, Yoshihiro Kawaoka, to try to figure out how the virus transformed itself into such a "hot" pathogen. Kawaoka, now a professor of virology at the University of Wisconsin, Madison, compared the genetic structure of viruses from the first and second waves and found only a single, extremely subtle change in the H gene. The two viruses differed by just one nucleotide--one of 1,700 nucleotides that made up the gene...
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