A method of manufacturing a therapeutic agent for the treatment of leprosy comprising - (a) suspending living egg cells or rotten egg cells with water in the ratio of 1:1, (b) chlorinating as herein defined the so obtained aqueous suspension above 55 C. and cooling the chlorinated mass to room temperature, (c) subjecting the cold chlorinated mass to distillation at below 55 C. and finally isolating the distilled product and storing in air tight container.
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