After our local flu pandemic exercise, I put together a kit of:
A couple N95 masks
A few packs of nitrile gloves
Safety glasses
A bunch of hand sanitizer and extra isopropyl alcohol
A few packs of Immodium AD
A few packs of flu symptom relievers (kids and adult)
A couple cans of Gatorade

If we did get hit with a near worst-case, it gives me the basic recommended protection in case I had to go out for something. But more importantly, we've got some simple tools to fight the symptoms, especially dehydration.