This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20200901

  Code	Display
  387972009	Bird
  1348009	Day care
  260413007	None
  42665001	Nursing home
  303071001	Other Family member

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20200526

  Code	Display
  PHC1620	Classmate
  PHC1619	Co-worker
  PHC1567	Human case of psittacosis

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-RoleCode version 20140716

  Code	Display
  FTH	father
  MTH	mother
  SIB	sibling

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  OTH	other
  UNK	unknown