Disease Risk Alleles through Millennia (IMAGE) Georgia Institute of Technology Caption Charted data clearly illustrate a progressive improvement over the millennia in the genetic foundations of health, in nearly all diseases examined. Smaller shapes indicate better overall foundations. The dotted round line labeled 50% indicates average modern human disease allele occurrence. Credit Georgia Tech / LaChance, Berens, Cooper, Callahan Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.