[BarryC]

Thanks also Jnana - very helpful. Just anecdotal, but I have a family member in shipping grains and they also saw a drop off but then a slight resurgence as these graphs show.

Then again, I would not dismiss what Dr. James says in principle because I think it IS wise to prepare. We should all do the thought experiment, "What would my family do if the stores were closed for a month or more?" Not to panic, just think it through - then thoughtfully prepare.