Medical research is vital to the advancement of health care, but many medical research studies have too few people who participate. A new study from the University of Michigan takes an in-depth look at public participation in medical research across the United States. Through a unique, nationally representative survey of 2,150 households in 2011, University of Michigan researchers found that only 11% of adults and 5% of children had ever participated in medical research. The study was published in January in Clinical and Translational Science.