1.   Have you been struck down with flu this year?

2.   At the first signs of the flu this year, Maria Flegas did not load up on over-the-counter drugs to quiet her cough and relieve her congestion.

3.   The Atlanta-based CDC helps to manage a worldwide detection system that tracks major and minor changes in flu each year.

4.   The vaccine is produced after health researchers decide which of the influenza viruses are most likely to cause the flu that year.

5.   There are many millions of cases of flu each year.