West Nile virus (WNV) is spreading, and horse owners are asking, What can I do to protect my horses? The good news is that a vaccine for horses has been developed and conditionally approved by the USDA. Experts say the WNV vaccine should work”P>West Nile virus (WNV) is spreading, and horse owners are asking, What can I do to protect my horses? The good news is that a vaccine for horses has been developed and conditi”>West Nile virus (WNV) is spreading, and horse owners are asking, What can I do to protect my horses? The go”West Nile virus (WNV) is spreading, and hor