...Where the disease is general, successful effortsadopted for its control have followed the immunization by inoculation of theexposed animals and a strict application of appropriate sanitary measures... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...For immunization purposes it is advisable to use the simultaneous method;that is, both the spore vaccine and the anthrax serum should be injected...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
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