| Code | Display | Definition | English (United States) (English (United States), en) |
| absent | Absent | Eligible person not present at the time of the visit. | |
| sleeping | Sleeping | Child asleep and not woken (polio doorstep convention). | |
| sick | Sick | Deferred due to illness or contraindication at time of visit. | |
| refusal | Refusal | Caregiver or individual refused — capture the refusal reason separately. | Population refusal |
| inaccessible | Inaccessible | Dwelling or settlement could not be reached (security, terrain, weather). | |
| not-visited | Not visited | Household never reached by a team during the round. | Absence of DC |
| not-revisited | House not revisited | Household was flagged for a revisit (e.g. child absent on first pass) but the revisit did not happen before the round closed — distinct from never-visited. Polio house-to-house monitoring reason (forms-v1 / jul3-form-analysis §Aggregate #4). | |
| medication-shortage | Medication shortage | Area not treated because the medicine/commodity ran out or never arrived. | |
| insecurity | Insecurity | Area not reached due to armed conflict, unrest, or security restrictions. | |
| difficult-access | Difficult access | Area not reached due to terrain, distance, or seasonal inaccessibility. | |
| not-required | Not required | Area not treated because it was not targeted this round (e.g. not co-endemic for the disease). | |
| other | Other | Other reason — record detail in text. | |