Who is Jason Posner, M.D. in the play, Wit?

Jason, 28 years old, is a researcher who must complete his clinical fellowship as part of his accreditation. Jason is not a natural with patients and bedside manners. He is more comfortable with cells and numbers and measurements. Jason was a student in Vivian’s class. He has a great respect for Vivian as a professor. He recognizes Donne’s exceptional intelligence and appreciates the complexities the poet explored in his sonnets. Jason goes through a journey during the play so at the end he has a greater awareness of a patient’s reality when faced with death.