So here's something interesting: according to
this study, standard rhinoviruses (the ones that cause colds) may block the Wu Flu from replicating, leading to lower transmission and, if I understand correctly, a less severe coof case if you do catch it. In other words, if you catch a cold, it looks like you'll have less of a problem with the Wu Flu.
The point I'm getting at is, if these idiots want to remain muzzled up forever, weaken their immune systems by blocking out all weak contagions, and then suffer a severe coof case when they inevitably catch it, you won't see me shedding a single tear.