The Afterblight Chronicles:Kill or Cure (Afterblight Chronicles 2)

Jasmine is part of a team of scientists who have discovered a cure to the deadly virus that has destroyed most of the world's population. However, it has a devestating side-effect, driving the recipient into a schizophrenic state. Now Jasmine must keep it together while trying to escape the clutches of the pirate rulers of the New Carribean.