Kidd Blood Group

Number of Antigens: 3

Gene:  SLC14A1
Transfusion Reaction: Yes—common cause of delayed hemolytic transfusion reactions.
Anti-Jka and anti-Jkb are dangerous antibodies because they can be difficult to detect in routine blood cross-matches. They are a common cause of delayed hemolytic transfusion reactions. Anti-Jk3 is rare and can cause immediate and delayed hemolytic transfusion reactions.
Hemolytic Disease of the Newborn: Yes—typically mild disease.
Anti-Jka has been implicated in at least one severe case of HDN, but most cases of HDN caused by the anti-Kidd antibodies are mild in nature.

Antibodies:

Jka (JK1)

Jkb (JK2)

JK3


Reference:

https://www.ncbi.nlm.nih.gov/books/NBK2272/