Your doctor isn't going to screen you for sickle cell if you're white.
Another reply has already shown the error of thinking that the sickle cell trait is confined to populations identified as "white." It is not. What is your proposed definition of races on biological grounds, and what is your citation for a scientific consensus on that?
for citations to recent primary research literature backing up the statement that "race" as now construed in society has very little medical usefulness. The author is a neurobiologist.
Another reply has already shown the error of thinking that the sickle cell trait is confined to populations identified as "white." It is not. What is your proposed definition of races on biological grounds, and what is your citation for a scientific consensus on that?
See
http://www.amazon.co.uk/Strange-Fruit-Sides-Wrong-Debate/dp/...
for citations to recent primary research literature backing up the statement that "race" as now construed in society has very little medical usefulness. The author is a neurobiologist.