I would get it while it is available. There have been shortages here and there in the recent past that had everyone scrambling to find one, and some not finding flu shots at all.
Of course if you have issues that might determine when/if/how you should get a flu shot, consult
your doctor first, not other sources of info.
My rationale?
Two kids with some asthma/allergy issues. The flu would be hard on them- why take the chance of putting them through that? As for me and Bdarg, like we really have the time or luxury of being in bed for 2 weeks!

Plus I don't want my family being germ spreaders.