THERE ARE MANY RISH FACTORS FOR LEUKEMIA UNFORTUNATELY HOWEVER, MOST OF THEM ARE UNCONTROLLABLE

Cancer Therapy

If someone has received certain types of chemotherapy or radiation therapy for previous cancers, they will have a sightly increased risk to developing leukemia in on coming years because of the cell mutations.

Genetics

This factor is unpreventable.  General abnormalities from chromosomes play a large role in the development of leukemia.  Along with abnormalities in chromosomes,  carriying down syndrome as a dominant or dormaint trait increases one's risk.

Exposure to Radiation or Other Certain Chemicals 

If one is exposed to unusually high levels of radiation (like survivors form a nuclear bomb or ones dealing with nuclear power plant accidents), or certain chemicals, their risk increases dramatically.  Examples of these chemicals are benzane, which can be found in gasoline, and tobacco smoke; and formaldehyde which is used in chemical industry.


Human T-Cell Leukemia Virus

The Human T-Cell Leukemia Virus is a type of virus that infects T cells (a type of white blood cell) and can cause leukemia and lymphoma. HTLV-1 is spread by sharing syringes or needles used to inject drugs, through blood transfusions, through sexual contact, and from mother to child at birth or through breast-feeding.  This virus can be spread by the use of infected syringes or needles, often used to inject drugs, tranfuse blood, sexual contact, and through birth and brest feeding.