How do you boost your immune system

You had the flu last year and it was awful. It meant days in bed, time off work, calling in favours from family and friends and a cough that lasted weeks.

So this year you want to avoid getting sick and there's no shortage of vitamins and supplements claiming to help you do so.

But how useful are these in helping prevent colds and flu? And is there anything else you can do to boost your immune system?

Read more...: http://www.abc.net.au/health/features/stories/2015/07/22/4277927.htm