A new vaccine to protect horses against West Nile virus (WNV) has been developed and submitted for USDA review. If approved, it would be the first commercially available DNA vaccine for any mammalian or animal species.

Steve Chu, DVM, PhD, senior vice president, Global Research and Development, Fort Dodge Animal Health, explained the conceptual DNA vaccine to The Horse. The vaccine has two major components–one is a piece of DNA that codes for two West Nile viral proteins (the membrane protein and the envelope protein), and an adjuvant, which helps stimulate immune response

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