[peeps36]

I don't think they can control the spread of this disease when they don't know who is crossing the border. How many sick Mexicans are trying to cross the border to receive better medical care?

[AmericanInTokyo]

That could be the real stampede I wonder about.

Mexicans with the flu, then stampeding up (thanks to open borders) to the USA (even if they have to die in the desert) to make an attempt to get treatment from US facilities, Mexican ones being swamped themselves. They might not make it to the USA completely, but they certainly could pass it to healthier illegals who in turn could pass it further, up the chain.