Many years ago, I forget how many, a case of foot and mouth disease was traced to a salami sandwich discarded by a walker. The outbreak was confined to one farm with the only possible source being a transfer from someone on the footpath.
Many years ago, I forget how many, a case of foot and mouth disease was traced to a salami sandwich discarded by a walker. The outbreak was confined to one farm with the only possible source being a transfer from someone on the footpath.