Biomedicine is a field of science that studies the human body and looks for ways to make us feel better when we are sick. Population groups are groups of people who have something in common, such as where they live or the language they speak. In biomedicine, population groups can be used to study and compare different groups of people so that scientists can learn more about their health and what makes them different from other groups. For example, scientists may compare the health of people who live in different regions of the world, so that they can better understand diseases and conditions that are common in certain areas. By understanding population groups, scientists can find new ways to improve the health of everyone.