She’s not a fool and wouldn’t say something frivolously.
Absolutely correct, there is NO way Laura Bush would say this unless she knew what she was talking about. And to add to that, I once had someone poison me and I knew right away it was not just "bad food" or in my case "bad coffee." Most of us have had food poisoning at some point, but to be poisoned by some foreign substance is a whole 'nother level of malfunction.