Harry Potter does not have a defined blood type (A, B, O, AB) in the Harry Potter series. The "blood" referred to in the series relates to his wizarding heritage: Harry Potter is a half-blood wizard.
Understanding "Blood Status" in Harry Potter
In the world of Harry Potter, "blood status" refers to a witch or wizard's magical lineage. It's a controversial and often prejudiced concept, particularly within the pure-blood supremacist ideology of characters like Voldemort and his followers. The main categories are:
- Pure-blood: Wizards and witches with an entirely magical ancestry, with no Muggles (non-magical people) in their family tree.
- Half-blood: Wizards and witches with a mix of magical and Muggle ancestry. This is Harry's status, as his mother, Lily Potter, was Muggle-born, and his father, James Potter, was pure-blood.
- Muggle-born: Witches and wizards born to non-magical parents.
Therefore, when characters discuss "blood," they are referring to this heritage and not a medical blood type.