Health equity refers to the study of differences in the quality of health and healthcare across different populations. Health equity is different from health equality, as it refers only to the absence of disparities in controllable or remediable aspects of health. It is not possible to work towards complete equality in health, as there are some factors of health that are beyond human influence. Inequity implies some kind of social injustice. Thus, if one population dies younger than another because of genetic differences, a non-remediable/controlable factor, we tend to say that there is a health inequality. On the other hand, if a population has a lower life expectancy due to lack of access to medications, the situation would be classified as a health inequity. These inequities may include differences in the "presence of disease, health outcomes, or access to health care" between populations with a different race, ethnicity, sexual orientation or socioeconomic status.