How many were illegal aliens?
Is that a trick question?
"How many were illegal aliens?"
Probably most of them. Do you think Tyson Foods will be prosecuted for hiring illegals? I don't. And there is the problem. Without prosecution of employers AND better border enforcement, there is absolutely no incentive for employers not to hire illegals.
So they keep hiring them. They work cheap, they work hard, and they don't demand stuff. If you were Tyson Foods, you'd hire them too. No penalty for it.
Illegals - yep, ANOTHER reason to close the borders and fine businesses who use illegal alien labor.
Cuarenta y uno anyone?
Probably most of them, or immigrants at any rate.
That said, *I* have tested positive for TB, although I've never had it AFAIK. The last time I was tested, it was negative, but that's the only time since the first test that I was negative, and that first test was over 35 years ago. For some time I had to get a chest x-ray with routine physicals that normally wouldn't require one, just in case some encapsulated TB bacteria got loose.