CHICAGO--A potentially deadlier form of the bird flu virus poses one of the gravest known threats to humans and justifies an unprecedented call to censor the research that produced it, a top U.S. biosecurity official said on Tuesday.
The National Science Advisory Board for Biosecurity (NSABB) set off a furious debate in the scientific and public health communities in December when it asked the journals Nature and Science to censor two studies on new strains of the H5N1 virus that may make it more easily transmissable in people.
"The potential of this pathogen, in theory, exceeds anything else I can imagine," Paul Keim, acting chair of the NSABB, told Reuters in an e-mail.
Keim explained his personal decision to support censorship in this case in a commentary published on Tuesday in mBio, the journal of the American Society for Microbiology. The panel also published an explanatory piece in Nature and Science.
The panel cited fears that mutant versions of the H5N1 virus created by scientists at Erasmus Medical College in the Netherlands and the University of Wisconsin-Madison, could accidentally escape the lab or be used as a devastating form of bioterrorism. The censorship decision was a first for the panel, and it drew scathing criticism from many researchers who say withholding the information will set scientists back in the search for potential treatments and hamper public health efforts to track the virus.
The researchers involved in the studies have agreed to a 60-day suspension of their work to allow governments and public health agencies to debate how it should best be handled. A meeting on the subject is scheduled for mid-February at the World Health Organization in Geneva.
Keim, who chairs the microbiology department at Northern Arizona University, said the panel considered evidence that bird flu kills about half the people it infects, a much higher mortality rate than the devastating 1918-19 outbreak of Spanish flu that killed up to 40 million people. Making this deadly virus capable of easy transmission in people was "sobering," Keim wrote in mBio. "A pandemic by such a pathogen could reasonably be concluded to cause such devastation that it should be prevented at all costs."
The NSABB was formed after a series of anthrax attacks in the United States in 2001. It advises the Department of Health and Human Services and other federal agencies about "dual use" research that could serve public health but also be a potential bioterror threat.
The National Institutes of Health, which funded some of the research, agreed with the panel's assessment and made non-binding recommendations to Science and Nature to withhold key elements of the work.
Writing in Nature and Science, the NSABB panel said the "unprecedented recommendation" took into account the potential benefits of publishing the works and the harms that could follow. "Our concern is that publishing these experiments in detail would provide information to some person, organization or government that would help them to develop similar mammal-adapted influenza A/H5N1 viruses for harmful purposes."
