Why does the author and researchers call an end to research on race?

Race, Ethnicity, and Health: A Public Health Readerby Thomas A. LaVeist and Lydia A. Isaac | Oct 16, 2012Chapter 1, 2, 3, 4. 5Historical and Political Considerations(1) LaVeist gives an argument against continuing to conduct research on race and health. Why does the author and researchers call an end to research on race?