Waiting for that who thinks “fudge it. I’m taking out as many as I can.”.
Just take ten Islamo-crazies deliberately infecting themselves, coming to the US, and traveling around, consciously visiting shopping malls, roadside/interstate restaurants, spreading their deadly germs. Applying bits of their saliva on every door, every table, every elevator button around. All before they get too incapacitated and finally succumb.