---
title: ENDaysSinceOnsetOfSymptomsUnknown
framework: exposurenotification
role: symbol
role_heading: Global Variable
path: exposurenotification/endayssinceonsetofsymptomsunknown
---

# ENDaysSinceOnsetOfSymptomsUnknown

A value used when the number of days since onset of symptoms is unknown.

## Declaration

```swift
var ENDaysSinceOnsetOfSymptomsUnknown: Int { get }
```

## Discussion

Discussion important: This property is available in iOS 12.5, and in iOS 14.0 and later.

## See Also

### Configuring Infectiousness

- [infectiousnessForDaysSinceOnsetOfSymptoms](exposurenotification/enexposureconfiguration/infectiousnessfordayssinceonsetofsymptoms.md)
- [infectiousnessHighWeight](exposurenotification/enexposureconfiguration/infectiousnesshighweight.md)
- [infectiousnessStandardWeight](exposurenotification/enexposureconfiguration/infectiousnessstandardweight.md)