B. Having had such a severe reaction already, she is unlikely to repeat this again.

When allergic reactions occur, they tend to get worse, not better, with repeated exposure. But this was not a allergic reaction. Some vaccine recipients may experience transient fever as a reaction to the vaccine, but this rarely last more than 24 hours. In this case, the patient got her vaccine too late. She had the misfortune of contracting wiltype influenza before the vaccine immunity could take effect. So, she had "the flu" all right, but not from the vaccine -- in spite of it!