After much controversy and delay, on 2.5, weekly medical journal Nature published a study how to create variants of the deadly H5N1 bird flu virus, allowing it to spread in mammals.
Research by Yoshihiro Kawaoka said University of Wisconsin (USA) head, is one of two experiments that a scientific advisory board federal proposal to postpone publication of journals, for fear they might "draw road "for terrorists biological weapons.
This issue also raises fierce debate between academic freedom and duty to protect the public before a pandemic potential destruction.
Science Advisory Board National Biosecurity U.S. withdrew opposition after learning the virus is less toxic than previously feared, according to the Washington Post.
Since its appearance in Hong Kong in 1997, H5N1 virus has killed millions of birds, mostly in Asia. People infected with this virus is not much, but if infected, they are more likely to die. Since 2003 until now, there are 355 deaths among 602 cases of H5N1 virus infection.
However, so far, the H5N1 virus can not spread easily from person to person through respiratory tract, and some scientists have begun to doubt the ability of this virus.
Two independent studies Kawaoka and his Ph.D. Ron Fouchier of the Erasmus Medical University in the Netherlands have changed the above point by demonstrating that with a little variation, the H5N1 virus can spread easily between flavor of mink, mammal who represents the laboratory.