Question: Public health often faces a need to determine which population should receive the most attention. "The meaning of "vulnerable populations" continues to transform. For most of the 1900s, public health focused on maternal and child health and high-risk occupations as the operational definition of "vulnerable populations'" (Riegelman, R., and Kirkwood, B. 2014). How would you define a vulnerable population? How has the demographic of the "vulnerable population" changed over time? What roles do health determinants play in identifying vulnerable populations?