Why is toilet paper vanishing from supermarkets?

You might notice something unusual, not to mention unfortunate, next time you try to stock up on bathroom supplies at your local grocery store.

Not just the bare shelves where hand sanitizer and cleansing wipes were plentiful only a few weeks ago, but the empty aisles where toilet paper usually abounds in quantities from single rolls to packages of more than a dozen.

Some are even adorned with signs limiting the number of purchases per customer.