I've never had a flu jab - haven't ever had flu that I can remember and am generally very healthy - however, an 'invitation' to have one dropped on the mat with the explanation that as I was now 250 years old my immune system may not be as good as it was - I gave it some thought and decided that as I had a five week overseas trip booked for early February it was maybe an idea to have the jab. Never felt anything when I had the jab, had absolutely no side effects whatsoever and am glad I did it. Had I not been going overseas though, I wouldn't have had it.