Hello my brethren,
One point I want to make: the US is already implementing quarantine for people suspected of having swine flu. As far as I know, they are being quarantined in their own homes. This is good, actually, and normal for a situation such as this, HOWEVER it also is a good reminder to have food and medicine at home. Stay home if you are sick. Do not push it. If you have been around others who were symptomatic with the flu, then stay home for a few days if you can, as you can pass the germ before you feel symptoms.
I might be repeating myself, but I would also suggest buying a few trinkets for the children in the family. Stickers, pretty pencils, balloons, whatever you think would bring a smile to their faces. Some candy for the whole family might not be bad either. Think of necessity first, of course, but also think of emotional "helps".
If there is flu in your area, I would recommend cancelling whatever you can. I have read, but am not positive, that sinus rinses can help prevent illness as they literally wash out the flu before it can establish itself. I would think it certainly worth a try, and we plan to do so when the flu hits closer to us.
I would also consider things such as vitamin D as there are anecdotal reports that higher vitamin D might help prevent illness. Again, this is one of those "can't hurt, might help" things. You can get vitamin D drops (one drop per person per day).
Sambucol (elderberry tincture) has been clinically proven in scientific trials to reduce the risk of contracting influenza A. You can make your own, or buy it. Most health food stores should have it.