Byline: LISA MURPHY/CHATELAINE OCTOBER/PLANET SYNDICATION
THE simplest things may strengthen your body's self-defence system, from a hearty belly laugh to eating a peach in bed.
With winter approaching, the chances are you haven't given much thought to fortifying your body's inner defences against viruses, bacteria and toxins.
However, getting your immune system - an intricate collaboration of organs, cells and chemical messengers - into shape can be easy, energising and fun.
Eating the right foods, for example, may help restore the disease-busting tools nature already gave you.
And you're getting a boost from researchers who are trying to unravel the complexities of your immune system.
The basics are understood well enough: imagine someone with the flu sneezes in your direction. Anti- germ substances in your skin, mouth and nose go to work right away to keep the flu virus from entering your body.
If they fail, the virus may make …