What should be done for Mrs. Hogan?
E) Admit her for both supportive and anti-viral therapy with rimantadine or amantadine.
Correct!
Yes, amantadine or rimantidine (100mg bid) could be life saving in this case and should be started ASAP. It is most effective when given early in an influenza infection, though relatively contraindicated in pregnancy; in this situation the benefits happen to outweigh the risk. Supportive therapy (supplemental oxygen, fluid management, etc.) may also be life saving for this patient.