Does the flu shot wear off if I get it too early?

Flu vaccine protection lasts about one year. Other than children who are getting the flu vaccine for the first time, people only need one dose of flu vaccine each season.  

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1. What types of flu vaccine are available?
2. When does the flu season start? When does it end?
3. Can a flu shot give me the flu?
4. Is this year's vaccine a good match?
5. Why do we count pediatric flu deaths and not adult flu deaths?
6. What is the difference between a pandemic and a normal flu season?
7. When should I get vaccinated?
8. Does the flu vaccine work right away?
9. Does the flu shot wear off if I get it too early?
10. What protection does the flu vaccine provide if I do get sick with flu?
11. Why do I need a new flu shot every year?
12. Where can I get a flu vaccine?