Trisher it is worth considering, specially as you get a little older.
Every year the World Health Organisation researches the main strains of influenza in circulation and decides on the particular virus strains that should be in the next version of the flu vaccine.
The one we get is based on the types of flu that have been circulating in the S Hemisphere during their last winter.
Sometimes the viruses that circulate here are identical to the ones in the vaccine, in which case it gives very good protection. Other years the overlap of varieties is not so good, which happened last year.
It's a bit like wearing a seat belt really - they don't save lives/prevent serious injuries in every car crash, but they protect a lot of the people, a lot of the time. Just because they are not 100% protection is not a good reason to not use them.
We have not had a major epidemic for several years - since swine flu 2009 -10. That was an unusual one because a lot of older people seemed immune, possibly because there was a similar epidemic when we were younger. It killed hundreds of thousands around the world, some of them pregnant women. At the time my son was having cancer treatment that completely obliterated his immune system for a while - I remember we were all pretty anxious. By having a jab we can avoid passing on flu to relatives, friends and vulnerable people in the community.