Exercise (intense, but short of inducing chronic exhaustion) and good nutrition boost the immune system.

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The underlying tenet of Goldstein's practice is to boost the immune system and let nature heal itself.

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Other companies working on therapies that boost the immune system against cancer include Bristol-Myers Squibb and GlaxoSmithkline.

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Big drug companies, including Pfizer, Bristol-Myers Squibb and Sanofi-Aventis, are doggedly pursuing drugs that aim to boost the immune system to fight cancer.

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The drug is among a new generation of drugs and vaccines that can boost the immune system to kill tumor cells.

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Drugs that boost the immune system against cancer, such the melanoma drug ipilimumab from Bristol-Myers Squibb, could also get around the many-gene-defects problem.

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In Los Angeles the company is test-marketing an herbal tea drink called Carpe Diem that's supposed to boost the immune system and improve metabolism.

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But Dr Franco Lori from the Research Institute for Genetic and Human Therapy in Washington DC has been investigating whether interruptions in treatment might actually boost the immune system.

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Many people believe that taking extra vitamin C will not only protect your heart, but can prevent colds, boost the immune system, fight cancer, and help to cleanse the body.

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The vaccine has two parts, one to prime the immune system and one to boost it.

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