Erlyn Macarayan is a postdoctoral researcher at HQSS and Ariadne Labs. She recently completed a year of postdoctoral research in epidemiology at Yale University. She earned a PhD in health systems at the University of Queensland in Australia. Lyn has also worked on projects with the Gavi Vaccine Alliance in Switzerland and the WHO Regional Office for Europe in Denmark, as well as a presidential policy officer in the Philippines. She is also a trained nurse. Lyn loves nature, gardening and cooking Filipino food.