J. Christopher Wagner was a leader in the field of mesothelioma who made major contributions to the understanding of mesothelioma, its cause and the goals for prevention. The International Mesothelioma Interest Group presents the Wagner Medal every two years to an individual who has made major original contributions to the understanding of mesothelioma, either in basic or applied research. It is the highest honor presented by the International Mesothelioma Interest Group to a leader in the field. Dr. Testa was awarded the medal for his contributions to mesothelioma research that have had a major impact on our understanding of the biology of this dreaded disease.