We’ve all met the person who, as one malaise follows another, declares, ‘If it’s not one thing with me, it’s something else!’ But have we ever wondered why this might be so? Is it just bad luck that this poor individual appears to be a constant repository of illness? Or is there something else lurking in the shadows? And is it lurking in me as well? Many of us are aware of the placebo effect. We are unknowingly given a dummy pill, with no restorative power in itself – but …