When my relatives were escaping Hitler and Stalin, after years of waiting to enter legally (true immigrants, not this pc watered down version), many were not admitted into the US because they tested positive for tb. Many of the tests were false positives.
In today's society, tb, whooping cough, and other communicable diseases are perfectly all right and no one dare talk about the illegal aliens transport systems.
And now, TB has come back with a vengance too, primarily in the prison population. Hrmmmmmmmmmm!