---
title: HKBloodType.abNegative
framework: healthkit
role: symbol
role_heading: Case
path: healthkit/hkbloodtype/abnegative
---

# HKBloodType.abNegative

The user has an AB– blood type.

## Declaration

```swift
case abNegative
```

## See Also

### Constants

- [HKBloodType.notSet](healthkit/hkbloodtype/notset.md)
- [HKBloodType.aPositive](healthkit/hkbloodtype/apositive.md)
- [HKBloodType.aNegative](healthkit/hkbloodtype/anegative.md)
- [HKBloodType.bPositive](healthkit/hkbloodtype/bpositive.md)
- [HKBloodType.bNegative](healthkit/hkbloodtype/bnegative.md)
- [HKBloodType.abPositive](healthkit/hkbloodtype/abpositive.md)
- [HKBloodType.oPositive](healthkit/hkbloodtype/opositive.md)
- [HKBloodType.oNegative](healthkit/hkbloodtype/onegative.md)