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NIAID DNA vaccine for H5N1 avian influenza enters human trial

nfluenza vaccine trial is further evidence of the ability of the NIAID Vaccine Research Center to rapidly translate basic research into potential products," he adds. "Our accelerated effort to understand and find new solutions to pandemic influenza is part of the NIAID commitment to respond to new emerging infectious disease threats and to improve public health preparedness."

Highly pathogenic avian influenza A viruses, specifically H5N1, have emerged in the past decade, causing widespread sickness and death in domestic and wild bird populations. As of December 27, 2006, 261 laboratory-confirmed human cases of H5N1 had been reported to the World Health Organization, resulting in death of more than half of infected individuals. While human cases remain relatively rare and are largely the result of direct virus transmission from infected birds, a few cases of human-to-human transmission have been reported. The severity of disease and the potential for human-to-human spread has provided a major incentive to accelerate developing a human vaccine for avian influenza.

With the spread of avian influenza virus, new strains have emerged, including clade II viruses in Indonesia and elsewhere that have drifted genetically from the initial strains detected in Southeast Asia. With this study, the investigators hope to learn whether new technologies, such as DNA vaccines, can provide protection against such viruses.

"This vaccine is aimed at newer strains of the H5N1 virus that currently pose a threat in Indonesia and represents an example of our ability to respond to shifting viruses with modern technology," says Dr. Nabel.

The study will enroll 45 volunteers between the ages of 18 and 60. Fifteen will receive placebo injections and 30 will receive three injections of the investigational vaccine over 2 months and will be followed for 1 year. Volunteers will not be exposed to influenza virus.

The vaccine contains no infectious ma
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Source:NIH/National Institute of Allergy and Infectious Diseases


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