| Coding | Meaning |
| 0 | Null data |
| 1 | asymptomatic - closed setting screen resident - care home |
| 2 | asymptomatic - closed setting screen resident - supported living |
| 3 | asymptomatic - incident investigation general public (none of above) |
| 4 | asymptomatic - incident investigation keyworker - care home |
| 5 | asymptomatic - incident investigation keyworker - hospital |
| 6 | asymptomatic - incident investigation keyworker - other sector |
| 7 | asymptomatic - incident investigation keyworker - primary/community care |
| 8 | asymptomatic - incident investigation keyworker - school/college |
| 9 | asymptomatic - incident investigation keyworker - supported living |
| 10 | asymptomatic - incident investigation resident - care home |
| 11 | asymptomatic - incident investigation resident - supported living |
| 12 | asymptomatic - keyworker screen keyworker - care home |
| 13 | asymptomatic - keyworker screen keyworker - domiciliary care |
| 14 | asymptomatic - keyworker screen keyworker - fire and rescue |
| 15 | asymptomatic - keyworker screen keyworker - hospital |
| 16 | asymptomatic - keyworker screen keyworker - other sector |
| 17 | asymptomatic - keyworker screen keyworker - primary/community care |
| 18 | asymptomatic - keyworker screen keyworker - prison |
| 19 | asymptomatic - keyworker screen keyworker - school/college |
| 20 | asymptomatic - keyworker screen keyworker - supported living |
| 21 | asymptomatic - oncology screen general public (none of above) |
| 22 | asymptomatic - other pre-admission screen general public (none of above) |
| 23 | asymptomatic - pre-operative screen general public (none of above) |
| 24 | asymptomatic - pre-operative screen keyworker - hospital |
| 25 | asymptomatic - pre-operative screen resident - care home |
| 26 | asymptomatic - pre-operative screen resident - supported living |
| 27 | asymptomatic - pre-partum screen general public (none of above) |
| 28 | asymptomatic - routine inpatient screen general public (none of above) |
| 29 | asymptomatic - routine inpatient screen keyworker - hospital |
| 30 | asymptomatic - routine inpatient screen resident - care home |
| 31 | asymptomatic - transfer/discharge screen general public (none of above) |
| 32 | asymptomatic - transfer/discharge screen keyworker - domiciliary care |
| 33 | asymptomatic - transfer/discharge screen keyworker - hospital |
| 34 | asymptomatic - transfer/discharge screen keyworker - primary/community care |
| 35 | asymptomatic - transfer/discharge screen keyworker - supported living |
| 36 | asymptomatic - transfer/discharge screen resident - care home |
| 37 | asymptomatic - transfer/discharge screen resident - supported living |
| 38 | asymptomatic - unplanned admission screen general public (none of above) |
| 39 | care home resident |
| 40 | care home worker |
| 41 | educational institution worker / resident |
| 42 | emergency services worker |
| 43 | healthcare worker |
| 44 | household member of essential worker |
| 45 | immunocompetent |
| 46 | immunocompromised |
| 47 | inpatient - immunocompetent |
| 48 | inpatient - immunocompetent healthcare worker |
| 49 | inpatient - immunocompetent none of the above |
| 50 | inpatient - immunosuppressed |
| 51 | inpatient - immunosuppressed none of the above |
| 52 | lives in a closed / institutional setting care home |
| 53 | lives in a closed / institutional setting hostel / supported living |
| 54 | neither of the above household member of key worker |
| 55 | neither of the above none of the above |
| 56 | none of the above |
| 57 | other essential worker |
| 58 | staff |
| 59 | symptoms of covid general public (none of above) |
| 60 | symptoms of covid keyworker - ambulance |
| 61 | symptoms of covid keyworker - care home |
| 62 | symptoms of covid keyworker - fire and rescue |
| 63 | symptoms of covid keyworker - hospital |
| 64 | symptoms of covid keyworker - other sector |
| 65 | symptoms of covid keyworker - primary/community care |
| 66 | symptoms of covid keyworker - school/college |
| 67 | symptoms of covid resident - care home |
| 68 | symptoms of covid resident - supported living |
| 69 | works as a key worker care home |
| 70 | works as a key worker fire and rescue |
| 71 | works as a key worker hospital |
| 72 | works as a key worker hostel / supported living |
| 73 | works as a key worker none of the above |
| 74 | works as a key worker primary or community care |
| 75 | works as a key worker school / university |
| 76 | asymptomatic - oncology screen keyworker - hospital |
| 77 | asymptomatic - routine inpatient screen resident - supported living |
| 78 | general public (none of above) |
| 79 | resident - care home |
| 80 | asymptomatic - unplanned admission screen keyworker - hospital |
| 81 | immunotherapy |
| 82 | asymptomatic - closed setting screen general public (none of above) |
| 83 | asymptomatic - keyworker screen keyworker - ambulance |
| 84 | asymptomatic - other pre-admission screen keyworker - hospital |
| 85 | asymptomatic - other pre-admission screen resident - care home |
| 86 | asymptomatic - pre-operative screen keyworker - care home |
| 87 | asymptomatic - pre-operative screen keyworker - other sector |
| 88 | asymptomatic - pre-operative screen keyworker - supported living |
| 89 | asymptomatic - pre-operative screen student - school/college |
| 90 | asymptomatic - routine inpatient screen keyworker - care home |
| 91 | asymptomatic - routine inpatient screen keyworker - primary/community care |
| 92 | asymptomatic - unplanned admission screen resident - care home |
| 93 | asymptomatic - unplanned admission screen resident - supported living |
| 94 | asymptomatic automatic electronic test request |
| 95 | keyworker - hospital |
| 96 | keyworker - other sector |
| 97 | resident - supported living |
| 98 | symptoms of covid automatic electronic test request |
| 99 | works as a key worker |
| 100 | asymptomatic - closed setting screen student - school/college |
| 101 | asymptomatic - routine inpatient screen keyworker - other sector |
| 102 | asymptomatic - routine inpatient screen keyworker - ambulance |
| 103 | asymptomatic - routine inpatient screen student - school/college |
| 104 | asymptomatic - transfer/discharge screen student - school/college |
| 105 | asymptomatic - unplanned admission screen keyworker - other sector |
| 106 | symptoms of covid keyworker - supported living |
| 107 | care resident asymptomatic - other reason please specify |
| 108 | care resident other symptoms no immunocompromise |
| 109 | general public / other asymptomatic - other reason please specify |
| 110 | general public / other asymptomatic - pre-hsct (recipient) |
| 111 | general public / other asymptomatic - pre-op |
| 112 | general public / other other symptoms immunocompromised |
| 113 | general public / other other symptoms no immunocompromise |
| 114 | general public / other sari (severe acute respiratory infection) immunocompromised |
| 115 | general public / other sari (severe acute respiratory infection) no immunocompromise |
| 116 | health/social care staff asymptomatic - other reason please specify |
| 117 | health/social care staff other symptoms no immunocompromise |
| 118 | immunocompromise |
| 119 | care resident asymptomatic - pre-op |
| 120 | care resident sari (severe acute respiratory infection) no immunocompromise |
| 121 | health/social care staff other symptoms immunocompromised |
| 122 | health/social care staff sari (severe acute respiratory infection) immunocompromised |
| 123 | health/social care staff sari (severe acute respiratory infection) no immunocompromise |