The previously discussed article about the swine flu and immigration included this: Careful not to fuel any backlash, Dr. John Carlo, Dallas County medical director, avoided characterizing any link to immigration. In other words, Carlo is withholding potentially vital information about the source of a potential public health emergency. If some or many of those who are infected in Dallas are visitors or illegal aliens from Mexico, the public has a right to know so that they can contact their elected officials and urge them to take action: greater inspection of those entering the U.S. or an...