Workers involved in recovery and cleanup at the Chernobyl nuclear power plant that exploded in 1986 in the former Soviet territory of Ukraine have an elevated risk of chronic lymphocytic leukemia (CLL) and other types of leukemia (Zablotska LB et al. Environ Health Perspect. doi:10.1289/ehp.1204996 [published online November 8, 2012]).
Friedrich MJ. Chernobyl and Leukemia Risk. JAMA. 2012;308(23):2449-2449. doi:10.1001/jama.2012.105522