Got news for you. We are not holding off contagious diseases in the least. They come here; their diseases come here. My son was exposed to an active case of TB when he was 11. No clue where he got it from. We hadn't traveled out of the country, no one in the entire school system had a case of TB. He was on antibiotics for 9 months to prevent the exposure from becoming active. For the rest of his life, he will always test positive for TB, because he has the "characteristic" in his body.<quoted text>
That would pose a health threat to the rest of us if we did.
If we can't hold-off contagious diseases, we are all at risk.
When I questioned where he would have been exposed, he said it was because of the people that come here from countries where it is prevalent (Asia and Mexico in particular)have no regulations on innoculating their children, like we do in the US.