A recent study of 479 Vietnam veterans who were involved in Agent Orange defoliation efforts in that country found that these individuals are twice as likely to develop a blood condition known as monoclonal gammopathy of undetermined significance, or MGUS. The disorder is a precursor for multiple myeloma, a type of blood cancer.
http://www.infowars.com/study-finds-link-between-agent-orange-and-blood-cancer/