I got the flu vaccine last year, do I need to get it again?

Flu viruses change constantly which requires a new flu vaccine to be produced each year. The viruses in the vaccine change each year based on worldwide monitoring of influenza viruses. The flu vaccine protects against the three main flu strains that research indicates will cause the most illness during the flu season.

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1. Can the flu vaccine give you the flu?
2. Are the "stomach flu" and influenza the same thing?
3. Is December or later too late to get the flu vaccine?
4. I got the flu vaccine last year, do I need to get it again?
5. Is hand washing the best way to prevent the spread of the flu?
6. How is the flu virus spread?
7. People get the flu all the time. It's not that serious, right?
8. I hate shots, is there another way I can get the vaccine?
9. Can I spread the flu if I don't have any symptoms?