This doesn't mean I don't think my dietary changes haven't helped. I've had many sinus infections in my life and this one doesn't feel nearly as bad as the others: I don't feel congested and I'm not in pain, I've just been tired and coughing for a week and a half. I feel like I have a stubborn cold. Previous sinus infections left me feeling tired for months; I'll follow up on how this one goes.
I credit the lack of congestion to dropping wheat. Just a few weeks ago on Dr. Davis's Heart Scan Blog, I remarked that I'd had no seasonal allergies this year. (A few others echoed the comment.) And as the nurse talked to me, I wondered how many middle-aged patients she saw who took no medications, or women patients who were in the neighborhood of 116 pounds. Without my changes to diet, I wouldn't fall in either category.
Be that as it may, I think it's being honest to acknowledge that good diet and lifestyle doesn't mean you'll never get sick, and being sick doesn't mean you're doing something wrong. Paleo people got sick, too.