"At the first sign of a cold or the flu..."

I stopped to talk with an 87-year-old woman who was purchasing several containers of hydrogen peroxide. I asked her if she was a terrorist (terror suspect Zazi was found to have purchased large quantities of hydrogen peroxide from beauty supply stores). The woman told me that she was not a terrorist, but she "wouldn't mind knowing how to make a bomb!" I recognized then that she had a wonderful sense of humor, and I asked her some more questions about herself. She told me that she buys "tons of hydrogen peroxide," because it keeps her from getting colds or the flu. At the first sign of a cold or flu, she puts "five drops of hydrogen peroxide in each ear." She never gets colds or the flu, she says. Of course, her hearing isn't too good.