Larkin Callaghan recently completed her doctorate in health behavior and public health education at Columbia, focusing on women's health and global health development. With research and program experience in HIV and sexual health, social network building, trauma and violence, drug and alcohol abuse, and how socioeconomic status and history of abuse contribute to health and social mobility, she specializes in women's and adolescent health, population health, communication and social marketing and the health of vulnerable populations - and how they relate to one another. She also works as a UN Correspondent for MediaGlobal, covering issues affecting the least developed countries, with a not-exclusive focus on global health. She posts about public health, sociology and social justice, human rights, research, and gender. She manages the Reproductive Health Daily Tumblr and is a fellow in Health Communication and Epidemiology at Columbia's Mailman School of Public Health, where she writes and uses social and new media to promote research that focuses on health disparities, access and rights. She’s an avid runner and a California loyalist, and also posts longer opinion pieces on I'm Not Tired Yet at https://larkincallaghan.wordpress.com/.