Thanks for the anthrax info, guys. Though I understood her point, I got a wry chuckle out of Jeri's comment, "It's your own immune system that cures you": my own personal immune system isn't very good at that; I have lupus (SLE) and sarcoidosis, both chronic autoimmune diseases. So my body has been attacking itself for a long time before the terrorists got into the act! ;^)