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
  386661006	Fever
  43724002	Chills/ Rigors
  271795006	Fatigue and Malaise
  271807003	Rash
  68962001	Myalgia
  57676002	Arthralgia
  3723001	Arthritis
  25064002	Headache
  44695005	Paralysis or Paresis
  161882006	Stiff Neck
  20262006	Ataxia
  32798002	Parkinsonism
  419284004	Altered Mental Status
  91175000	Seizures
  9826008	Conjunctivitis
  422587007	Nausea
  422400008	Emesis
  62315008	Diarrhea
  21522001	Abdominal pain / Tenderness
  196746003	Persistent vomiting
  80515008	Liver enlargement (Hepatomegaly)

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

  Code	Display
  PHC1400	Retro-orbital Pain (pain behind eye)
  PHC1401	Extravascular Fluid Accumulation (e.g. Pleural, Pericardial effusion, Ascites)
  PHC1402	Mucosal Bleeding (e.g. Epistaxis - nose bleeding, gastrointestinal bleeding)
  PHC1403	Severe plasma leakage (shock, pleural effusion)
  PHC1404	Severe bleeding
  PHC1405	Severe Organ Involvement (Liver, Heart, Neurologic  - central nervous system)