§ Sir L. Plummerasked the Minister of Agriculture, Fisheries and Food whether he is satisfied that the serum used for vaccinating pigs in registered vaccinated herds has proved effective during the present swine fever outbreaks in the county of Essex and elsewhere; and whether he will make a statement.
Mr. AmoryA few pigs in registered vaccinated herds are known to have contracted swine fever, but otherwise, so far as I am aware, the herds in the scheme have not been affected. I am satisfied that the vaccine issued by my Department's Veterinary Laboratory, when used as directed in the instructions accompanying each bottle, gives a very high degree of immunity for the best part of 12 months.