There is a myth that if you haven’t gotten your flu shot by November, the opportunity is lost. The Center for Disease Control and the Minnesota Dept. of Health maintain that it’s just not true. As long as influenza is circulating (which is typically through March) you can still get the flu, and it’s still worthwhile even if it isn’t a perfect match, strain-wise.
If you use the excuse “I never get sick,” that’s not smart thinking. This could be your year. And, you can have an active flu virus yet not be presenting any symptoms yet, so feasibly could pass it on without knowing it to any family gathering, party, or at work.