What is the exposition in the novel, Vox?

The first several chapters of this novel contain exposition as Jean describes to the reader what life is like for women under the rules of the Pure Movement. The action begins to rise when Jean is contacted by the president to finish work on her serum to cure fluent aphasia. Jean senses that she is not being told the complete truth about the reason that the president and Reverend Carl want Jean’s cure so badly and so quickly.