If you haven’t been sick yet this cold and flu season, fortify your defenses against infection with these bits of immune-boosting advice:

> Adopt 4 healthy habits to give your immune system a boost.

> Cut out these 3 bad habits that zap your immunity.

> 8 nutrients your immune system needs + the foods you can find them in

> Should you get the H1N1 (swine flu) vaccination? Get answers to 7 safety and effectiveness questions to help you decide.

> Okay, so you got the H1N1 shot. You can relax now … right?

> What about the seasonal flu shot? Do I still need to get that one, too?

> Get it right: The 6 steps to a thorough hand-washing

> What about my baby’s immunity? (What to do if you have to take your baby to the ER + one mom’s experience with her baby’s bout of H1N1)

> Your kids and H1N1: 3 key talking points