In response to the recent cases of Potomac Horse Fever in Virginia the veterinarians at Blue Ridge Equine Clinic would like to offer the following advice. If your horse has been vaccinated for PHF after May 1st of this year, boostering at this time is not likely to offer any significant benefit. If your horse was vaccinated prior to May first then there may be some benefit to revaccinating your horse, we recommend calling and consulting with your vet about your individual circumstances. The PHF vaccine offers varying degrees of protection depending on who you ask, but we feel that it seems to lessen the severity of the disease in many, but not all cases. At this time we are not aware of any confirmed cases in Albemarle county, but there are cases reported in the Culpepper and Richmond areas and suspect cases elsewhere in central Virginia.