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Abstract
Avian influenza is a highly pathogenic poultry disease found around the globe. It is caused by different strains of avian influenza virus. The H5N1 strain is not spread worldwide in humans, although, sporadic contaminations have been reported. It is known that the virus spreads from animals to humans however, there is concern regarding the evolution of the virus and that it is now possible for the virus to spread from human to human. There is currently no vaccine available that can act against all strains of the virus, although some vaccines have reached clinical trial stage. Regardless, there is a great need to develop a vaccine which will be effective against all strains of avian influenza. This review will focus on recent advances with special reference to the development of DNA vaccines against avian influenza. The specific importance, the hurdles to development and the possible future strategies for the development of DNA vaccines against multiple strains of avian influenza will be discussed.
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