Filaggrin Loss of Function Worldwide (IMAGE) University at Buffalo Caption Pie charts show the proportion of chromosomes within different populations worldwide that carry a non-working copy of the filaggrin gene, a primary risk factor for eczema. Even in East Asia, where the rates are high, researchers found no evidence that preserving this genetic mutation has an evolutionary benefit to humans. The map was generated with data from more than 2,500 genomes. Credit Credit: Duo Usage Restrictions This image may only be used in news stories discussing the research in the related press release. 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.