Having been someone rarely troubled by colds, since last October I have been ill once a month with a cold that's put me in bed for a few days and then taken ages to go away. I've lost track of the tissues, meds etc that I've gone through. I'm so sick of plans being ruined and not being on form at work.
I'm slim, active, non smoker, excellent diet of fresh F and V, lots of protein, low alcohol.
What can I do to help prevent these infections?