Based on the passage, which of the following statements can best describe the side effects of vaccination?
A.
About 5 to 10 percent of children experience mild temporary side effects.
B.
Side effects of a flu vaccine will usually last for a very long period of time.
C.
If a child has never been infected by flu, he or she is more likely to have side effects.
D.
If a person has been exposed to the influenza virus before, he or she will not have side effects.