“…Sheep pox, an infectious disease of sheep, often becomes epizootic in sheep raising areas in some Asian and African countries. For many years different kinds of vaccines have been used extensively to control the disease (1,2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,20,22,23,24,26,27,29,31). Some of these vaccines have not proven to be safe and are poorly antigenic.…”