http://news.yahoo.com/details-lab-made-bird-flu-wont-revealed-223114982.html
This seems like a sensible decision to me, comparable to the practice of withholding certain details about the technology used to make nuclear weaponry. No sense making it easy to duplicate hazardous research!
80% of a secret is knowing that it exists.
http://news.yahoo.com/details-lab-made-bird-flu-wont-revealed-223114982.html