概括：because of the fear that the details of Flu experiments could provide a recipe for a bioweapon，A committee that advises the government says that details of experiments on bird flu virus should not be made public.



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Nell Greenfieldboyce
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For the first time, the federal government is asking scientists to keep details secret from controversial experiments, at a fear the information could be used to create a biological weapon. The two genetic experiments involved bird flu. NPR's Nell Greenfieldboyce first told us about the research last month. The virus was altered, making it potentially much more dangerous to people. Ever since 2001 and the anthrax attacks, biologists have discussed the fact that their legitimate work to understand diseases might sometimes have a dark side. This has mostly been a theoretical discussion until the recent bird flu experiments. Bird flu rarely infects people. But when it does, it can be deadly. Scientists wanted to know if this virus was capable of mutating in a way that would make it spread easily between people and cause a pandemic. So they altered its genes in the lab, produced a new flu virus that was far more contagious, and submitted their work for publication. "You know, this is a watershed moment, in the sense that I don't think any researcher has been ever asked to not publish important results like this before."