The chances of leukemia in one child and leukemia in the second child should be clarified to determine whether there are genetic abnormalities and family history in the family, if there are genetic abnormalities and family history, the prevalence of the disease may be higher compared to the average infant. Leukemia is generally not a hereditary disease, but is associated with mutations caused by gene fusion, resulting in problems with the blood-forming system. However, leukemia is also genetically linked and there may be a familial predisposition to leukemia. If there are other members of the family with leukemia, the chances of the second child having leukemia may be higher than in normal infants. If there is no leukemia in the family or in the parents of the child, then the chances of the second child having leukemia will be the same as that of a normal baby, and there will be no significant increase. In addition, it is necessary to pay attention to the need to reduce the exposure to infections or other harmful substances in order to reduce the chances of genetic mutation. If you feel uncomfortable or have any questions, please consult a specialist.