Who is Dr. David Silverstein? What kind of practice does he have?

Dr. David Silverstein

A physician at Nairobi Hospital who suspects that Dr. Musoke has been infected by a rare virus and sends samples of Musoke's blood serum to the CDC in 1980. After learning of the mysterious virus' similarities to the Marburg virus, Dr. Silverstein persuades Kenyan authorities to shut down Nairobi Hospital and quarantine the staff members who had interacted with Dr. Musoke and Charles Monet. Seven years later, Dr. Silverstein treats Peter Cardinal at Nairobi Hospital.