A risk factor is a characteristic that can make someone more likely to develop a disease. Having a risk factor, or even several, does not mean that you will get cancer.
Chronic Lymphocytic Leukemia Risk Factors
Currently, there are no known risk factors for CLL. However, there's very small predominance in some families.
Chronic Lymphocytic Leukemia Prevention
Because there are no definitive risks for CLL, there are no prevention recommendations at this time.