It's something I've never had, nor the rest of our family here. Hubby's mum and dad get it every year and usually a waste of time as they end up getting sick. Maybe they'd be worse if they didn't have it
They promote it quite a bit over here.
When you say they end up getting sick, do you mean sick with 'flu? It is possible to still get a mild dose even if you've had the vaccination, but 'full blown' 'flu will have you flat on your back for days. Might even kill you! Yes.........the jab is definately worth having!