Cystic fibrosis is indeed more common in caucasians, but it is by no means limited to caucasians. It has a prevalence of about 1 in 3,000 in whites in the U.S. However, it also has a prevalence of about 1 in 13,000 in Hispanics and 1 in 15,000 in African-Americans. This is not due solely to racial mixing, as cases of CF have been reported in black Africans with absolutely no caucasian heritage. CF in non-white populations may actually be under-recognized, for two reasons. One is that the genetic analysis that tests for the most frequently-seen mutations causing the disease can only test a couple dozen of hundreds of possible mutations, and the most common mutations that it tests for are more prevalent in whites with the disease than non-whites (the mutations do seem to be ethnicity-specific). Secondly, there are misinformed individuals (many physicians included), that think non-whites cannot have CF and so do not refer a patient with symptoms that may be due to to the disease for testing because they are not white. I have had patients with CF who are black, Hispanic, and from the Middle East.
Simply put, people who want to complain that CF is not “diverse” and state that it affects only whites are fools.
They were fools before they thought CF affected only white men. They will remain fools. Logic and rational thought have no place in their heads, they can only “feel”.