The article discusses a case of Hemolytic Disease of the Newborn caused by an antibody called Anti-Jk^b. The researchers observed this condition in a newborn baby and studied its effects. They found that the antibody was responsible for the destruction of the baby's red blood cells, leading to severe complications. This study sheds light on a specific cause of Hemolytic Disease of the Newborn and highlights the importance of understanding and managing such conditions in infants.