Different West Nile Virus Genetic Lineage Evolving?

by: Christy West
It's a variant of Murphy's Law: Anytime you think you have a handle on something, the unexpected happens and you're off balance again. The equine health world might be in this boat now concerning West Nile virus infection in horses. With several different types of vaccines available and in widespread use in the United States over the last several years, West Nile virus had gone f ...