In House M.D., which character is a specialist in immunology?

In House M.D., Allison Cameron is the team member who specializes in immunology.

Jennifer Morrison plays Cameron, one of the three doctors on House’s original diagnostic team. Immunology is especially relevant to the series because immune-system disorders can produce symptoms affecting many organs and can resemble infections, cancer, or neurological disease. Cameron’s specialty therefore contributes a distinct perspective during difficult diagnoses.

Cameron is characterized as compassionate and ethically sensitive, often challenging House when she believes his methods endanger patients or cross professional boundaries. Her personal history, including the death of her first husband, also influences the way she responds to seriously ill patients.

Cameron’s role changes during the series. She leaves House’s diagnostic team, works in the emergency department, and later returns to Princeton-Plainsboro in a different capacity. The character is sometimes confused with Thirteen, whose specialty is internal medicine and whose real name is Remy Hadley. Cameron’s formal field remains immunology.