Absolute count per colony type (IMAGE) International Society for Stem Cell Research Caption Research published today in Stem Cell Reports provides evidence that brief exposure to certain “danger signals” can prime the body’s innate immune system into a long-term hyperreactive and inflammatory state termed “trained innate immunity.” In this figure: brief exposure of HPCs to IL-1 beta increases GM colony formation (this manuscript). Credit Radboud University Medical Center Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.