I don’t. Not on some crazy anti-vaxxer grounds, I just never have. And I’ve never been seriously laid up with the flu, so if my opting out isn’t working, it is also not, not-working.
Anyway, I know many people who do get one. The CDC says:
Everyone 6 months of age and older should get a flu vaccine every season. This recommendation has been in place since February 24, 2010 when CDC’s Advisory Committee on Immunization Practices (ACIP) voted for “universal” flu vaccination in the United States to expand protection against the flu to more people.
