The U.S. government has released guidelines for future avian influenza research, moving domestic researchers under a voluntary moratorium closer to resuming their work on the virus. The guidelines require a detailed analysis of the risks and benefits associated with making the virus more dangerous before government funding will be made available. At the University of Wisconsin's Influenza Research Institute, where a professor produced an avian influenza strain that was transmissible between ferrets, no structural changes are necessary, but proposals for new work will have to undergo the additional review.

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