Leukemia begins in the immature of the developing cells of bone marrow. Bone marrow produces different types of blood cells: red blood cells that carry oxygen and other materials to the tissues of the body; white blood cells that fight infection; and platates that fight that help the blood clots grow. In all, the bone marrow produces an excessive amount of ABNORMAL white blood cells, which don't function properly and cause effects to a person's body dealing with leukemia.
There can but it will not last long. There are probably more carnivores because they were taking advantage of the supply of herbivores and now they will start to die off. So I guess my answer is no, not normally and not for a long time.
