Johns Hopkins Scientist Gets Colleagues, Family Involved in Baltimore Nonprofit October 7, 2021 HUM in the News Holdren-Serrell dedicates time and resources to Helping Up Mission By Michel Morris on 10/04/2021 Photo courtesy of Carrie Holdren-Serrell https://www.hopkinsmedicine.org/news/articles/johns-hopkins-scientist-gets-colleagues-family-involved-in-baltimore-nonprofit