I don't remember that in 1976. I was too busy celebrating the Bicentennial.
I think I would still be more scared of getting shot or kidnapped in Juarez, than getting swine flu. That place is out of control. A (mexican-american) guy I knew in the army once told me to never go to Juarez without a Mexican with you. You'll be stopped by the police (walking or driving) and will be arrested, unless you give them money.
But I hear they have good Mexican food there. Of course, they just call it "food". (humor credit goes to Chandler)