• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-ActCode version 8.0.0

  Code	Display	Definition
  CHLDCARE	Day care - Child care Interaction	**Description:** Exposure participants' interaction occurred in a child care setting
  CONVEYNC	Common Conveyance Interaction	**Description:** An interaction where the exposure participants traveled in/on the same vehicle (not necessarily concurrently, e.g. both are passengers of the same plane, but on different flights of that plane).
  HLTHCARE	Health Care Interaction - Not Patient Care	**Description:** Exposure participants' interaction occurred during the course of health care delivery or in a health care delivery setting, but did not involve the direct provision of care (e.g. a janitor cleaning a patient's hospital room).
  HOMECARE	Care Giver Interaction	**Description:** Exposure interaction occurred in context of one providing care for the other, i.e. a babysitter providing care for a child, a home-care aide providing assistance to a paraplegic.
  HOSPPTNT	Hospital Patient Interaction	**Description:** Exposure participants' interaction occurred when both were patients being treated in the same (acute) health care delivery facility.
  HOSPVSTR	Hospital Visitor Interaction	**Description:** Exposure participants' interaction occurred when one visited the other who was a patient being treated in a health care delivery facility.
  HOUSEHLD	Household Interaction	**Description:** Exposure interaction occurred in context of domestic interaction, i.e. both participants reside in the same household.
  INMATE	Inmate Interaction	**Description:** Exposure participants' interaction occurred in the course of one or both participants being incarcerated at a correctional facility
  INTIMATE	Intimate Interaction	**Description:** Exposure interaction was intimate, i.e. participants are intimate companions (e.g. spouses, domestic partners).
  LTRMCARE	Long Term Care Facility Interaction	**Description:** Exposure participants' interaction occurred in the course of one or both participants being resident at a long term care facility (second participant may be a visitor, worker, resident or a physical place or object within the facility).
  PLACE	Common Space Interaction	**Description:** An interaction where the exposure participants were both present in the same location/place/space.
  PTNTCARE	Health Care Interaction - Patient Care	**Description:** Exposure participants' interaction occurred during the course of health care delivery by a provider (e.g. a physician treating a patient in her office).
  SCHOOL2	School Interaction	**Description:** Exposure participants' interaction occurred in an academic setting (e.g., participants are fellow students, or student and teacher).
  SOCIAL2	Social/Extended Family Interaction	**Description:** An interaction where the exposure participants are social associates or members of the same extended family
  SUBSTNCE	Common Substance Interaction	**Description:** An interaction where the exposure participants shared or co-used a common substance (e.g. drugs, needles, or common food item).
  TRAVINT	Common Travel Interaction	**Description:** An interaction where the exposure participants traveled together in/on the same vehicle/trip (e.g. concurrent co-passengers).
  WORK2	Work Interaction	**Description:** Exposure interaction occurred in a work setting, i.e. participants are co-workers.

This value set expansion contains 17 concepts.