http://www.bbc.co.uk/news/health-20452192

Get fat, it worked for me

I would not know it must be more than twenty years since I had a cold or flu.

Maybe you just don't remember them?

You reasonably might expect that from me, but it was the same when I was a kid. I had almost no days off with sickness. I had the usual childhood viruses but few days off with any flu or cold. My mum said that I was rarely ill as a child. I might have had the odd runny nose but never anything enough to lay me out for days.