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Universal flu vaccine study yields success in mice
Date:2/18/2011

Adelaide researchers have taken a step closer to the development of a universal flu vaccine, with results of a recent study showing that a vaccine delivered by a simple nasal spray could provide protection against influenza.

University of Adelaide researcher Dr Darren Miller and colleagues have successfully trialled a synthetic universal flu vaccine in mice. The results have appeared this month in a paper in the Journal of General Virology.

"Current flu vaccines rely on health authorities being able to predict what the forthcoming viral strain is going to be, and reformulating the vaccines each year accordingly. This is extremely time consuming, labor intensive and expensive, and it's something that a universal vaccine could overcome," Dr Miller says.

"A simple and totally synthetic universal vaccine one that is not derived from an influenza virus and does not require annual reformulation would have clear advantages in health clinics to control and prevent the spread of flu."

Dr Miller and colleagues used specific peptides delivered to the noses of mice. The peptides trigger an immune response to a tiny region of the flu virus that is present in all influenza A and B viruses, which effectively neutralizes the virus.

The test vaccine provided mice with 100% protection against a laboratory strain of virus (H3N2) and 20% protection against a highly pathogenic virus (H5N1, known as "bird flu"), which is consistent with the protection levels achieved with commercially available anti-influenza drugs.

"This is a positive response and one that shows promise for further testing both in laboratory and clinical settings," Dr Miller says.

He says that while the universal vaccine could be given as an injection, using a nasal spray has a number of advantages: "It is non-invasive and
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Contact: Dr. Darren Miller
darren.miller@adelaide.edu.au
61-883-131-013
University of Adelaide
Source:Eurekalert

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