The benefits of having a healthy immune system are absolutely essential to wellbeing. Without proper immune function, we quickly become the victims of disease - shortening our lives and impacting our capacity for happiness.

Get enough sleep: Getting enough sleep is essential for a healthy immune system. When we sleep, the immune system is reinforced and replenished. Even one night's sleep loss can significantly suppress the immune system.

Wash your hands: Many micro-organisms are passed via skin contact with infected individuals or objects. Washing your hands before touching your face (rubbing your eyes, contacting your mouth or ears) can greatly reduce your exposure to harmful microbes in the environment; this lessens your chance of getting sick and of stressing your internal immune system.

Eat nutritious foods: Making sure your body receives only wholesome, nutritious foods is essential for optimum immune function. Immune-boosting foods include organically grown fruits and vegetables, wholegrain, beans and other legumes, natural oils such as expeller-pressed olive oil, hemp oil, walnut oil, flax oil and coconut butter. Brazil nuts, a rich source of selenium, are particularly good for the immune system. Selenium enhances immunity by activating glutathione peroxidase, an enzyme that inhibits the formation of free radicals and suppresses tumour growth.

Intake of Vitamin C: Fresh Kiwis, red peppers and to a lesser extent oranges, are rich sources of vitamin C, which is required by the immune system. Vitamin C is required by immune cells to enable optimal functioning. Interestingly enough, most animals produce their own vitamin C, whereas humans do not.

Take supplements: One needs to take additional supplements of nutrients and vitamins if the food intake is not providing adequate amounts.