Top immunity-boosting foods

Adding more confusion is the controversy over the safety and effectiveness of methods used to prevent or treat this new illness, like the H1N1 vaccine and antivirals. It's not surprising that many people are looking for "natural" ways to boost their own internal defences. Our immune systems are responsible for fighting off attackers like viruses, bacteria and toxins, but sometimes they need a little help.

How can you give your immune system a boost this year? Here's what experts are saying:

Healthy habits make the difference

Let's forget colds and flu bugs for a moment. Research on how our immune system functions is pretty consistent. We know we're better able to fight off infections when we get enough sleep, keep stress in check, exercise regularly and eat a balanced diet that provides plenty of nutrients.

In contrast, when we're lacking in these key areas, we're more likely to get sick and have a harder time fighting back. It doesn't matter if we're trying to fight the flu or ward off longer term threats like diabetes and cancer. The preventative measures are basically the same.

But when it comes to vitamins and minerals, it's sometimes hard to know if we're getting enough of the right ones. While the information about supplements and "super foods" can be confusing, health experts are clear on one thing: it's a healthy diet -- not any single food or supplement -- that makes a difference for keeping your immune system strong. Eating a wide variety of healthy foods ensures you're covered when it comes to essential infection-fighting nutrients like protein, vitamins A and C, zinc, beta-carotene, selenium and a host of other anti-oxidants.