Any decision to vaccinate is based on a veterinary assessment of risk and follows the FMD vaccination decision tree in the contingency plan. Vaccination is used as a disease control measure if it is demonstrated that steps additional to slaughter policy may be required to eradicate the disease.

In line with this decision tree and the emerging conclusions of epidemiology investigations it has been decided not to vaccinate at this time. However, this approach will be kept under constant review as the disease situation develops and the Forward Vaccination Centre will be kept in place.

As part of the evidence base for this decision Defra has today published an interim epidemiology report into the outbreak of Foot and Mouth Disease in Surrey

The report sets out initial findings of the National Emergency Epidemiology Group who have been investigating the outbreak. It concludes that it is very likely that the source of infection is the Pirbright site where Merial Animal Health Ltd and the Institute for Animal Health are located. The report goes on to identify the possible mechanisms for spread of the virus from the Pirbright site.

It concludes that the risk of spread of infection out of Surrey through movements of undisclosed infection in sheep during the risk period is very low. It sets out the most likely scenario that while there is a risk of further cases in the same area, it is unlikely that infection from the original release of the virus will occur, however, further cases could arise from secondary spread.

Chief Veterinary Officer, Debby Reynolds said:

"The decision not to vaccinate at this stage, but to retain our full readiness to do so, demonstrates that our contingency planning arrangements are working. The epidemiology report indicates that infection may be contained to the Surrey area. But, these are our emerging findings, this is a developing situation and new information may come to light at any stage which changes our understanding of the outbreak."

"It is therefore crucial that all animal keepers continue with the most stringent biosecurity measures, remain vigilant and contact their own veterinarian or local Animal Health Office if they have any concerns."