How would Dr Carson suggest we screen illegal immigrants for measles? Is he aware that Measles is not a problem in Central America? In fact as he should know, measles is much more likely to be imported from Asia and Europe. So the fact if your representation is true that Dr Carson chose to mention illegal immigration and measles in the same sentence is not courage but wrong on the facts. I cannot find Carson's words and perhaps you can post a link. The only thing I find is that he said this is not a political issue. If it is not then why did he feel the need to mention immigration, a highly political flashpoint, in his discussion of vaccines?