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Last Updated: Aug 19th, 2006 - 22:18:38

Influenza Channel
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Latest Research : Infectious Diseases : Influenza

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Unmasking the 1918 Influenza Virus
Oct 6, 2005, 23:13, Reviewed by: Dr.

The mysteries of the 1918-1919 influenza pandemic, that killed an estimated 50 million people across the globe, are finally beginning to be solved. Two scientific papers published this week provide insights into the virus that caused the most deadly influenza outbreak in modern history. This virus was unusual because it spread so quickly, was so deadly, and exacted its worst toll among the young and healthy. In just over one year, the virus infected one-third of the world’s population with death rates approximately 50 times higher than those associated with regular seasonal influenza.

 
The harsh reality of the 1918 pandemic is never far from the minds of scientists and public health officials who are monitoring the current influenza outbreak occurring in Asia. Since December 2003, a strain of influenza virus that usually infects only birds has sickened at least 116 people and killed 60 in Thailand, Vietnam, Cambodia, and Indonesia. This virus, known as H5N1 avian influenza A virus, has killed or forced the culling of more than 100 million chickens in 13 countries, has infected ducks and other migratory birds, and has been transmitted to tigers, cats, and pigs. The new research findings, published in the journals Science and Nature, provide critical clues to the genesis of the 1918 pandemic and why it was so lethal. The findings reveal essential information to help us speed our preparation for—and potentially thwart—the next influenza pandemic. For the first time, researchers have deciphered the entire gene sequence of the 1918 virus and have used sophisticated techniques to assemble viruses that bear some or all of these genes so their effects can be understood. Importantly, they have identified gene sequences that may predict when an influenza virus strain is likely to spread among humans.

The new studies could have an immediate impact by helping scientist focus on detecting changes in the evolving H5N1 virus that might make widespread transmission among humans more likely. For example, on the basis of these studies we know that the H5N1 virus currently circulating in Asia has acquired five of the 10 gene sequence changes associated with human-to-human transmission in the 1918 virus. Prior to publication, these scientific papers were reviewed by the National Science Advisory Board for Biosecurity (NSABB), an advisory committee to the U.S. Secretary of Health and Human Services and to the heads of all federal departments and agencies that conduct or support life science research. The Board was established to provide advice on ways to minimize the possibility that knowledge and technologies emanating from vitally important biological research will be misused to threaten public health or national security. The Board is comprised of members with a broad range of expertise in molecular biology, infectious diseases, biosafety, public health, veterinary medicine, plant health, national security, biodefense, law enforcement, scientific publishing and related fields.

The Board unanimously endorsed publication of the manuscripts and recommended “making such information widely available to the scientific community for the purpose of validating the research findings, building upon the research, and advancing the development of diagnostic assays, treatments, and preventative measures.”

The rationale for publishing the results and making them widely available to the scientific community is to encourage additional research at a time when we desperately need to engage the scientific community and accelerate our ability to prevent pandemic influenza. It would be impossible and counterproductive to attempt to enforce a worldwide ban on conducting research on the 1918 influenza virus or similar viruses because of fear of the misuse of such knowledge. Likewise, the dissemination of information emanating from this research should not be suppressed; rather, we must foster a culture of responsibility among the scientific community such that research is conducted under the safest possible conditions and research results are presented openly and responsibly for the purpose of improving human health.

Moving forward with research conducted by the world’s top scientists and openly disseminating their research results remain our best defense against H5N1 avian influenza virus and other dangerous pathogens that may emerge or re-emerge, naturally or deliberately. We feel that the certain benefits to be obtained by a robust and responsible research agenda aimed at developing the means to detect, prevent and treat these threats far outweigh any theoretical risks associated with such research.
 

- National Institute of Allergy and Infectious Diseases
 

niaid.nih.gov

 
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STATEMENT
Unmasking the 1918 Influenza Virus: An Important Step Toward Pandemic Influenza Preparedness

Anthony S. Fauci, M.D., Director, National Institute of Allergy and Infectious Diseases, National Institutes of Health and Julie L. Gerberding, M.D., M.P.H., Director, Centers for Disease Control and Prevention

NIAID is a component of the National Institutes of Health, an agency of the U.S. Department of Health and Human Services. NIAID supports basic and applied research to prevent, diagnose and treat infectious diseases such as HIV/AIDS and other sexually transmitted infections, influenza, tuberculosis, malaria and illness from potential agents of bioterrorism. NIAID also supports research on transplantation and immune-related illnesses, including autoimmune disorders, asthma and allergies.


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