A New, Ultra-Rare Blood Type Found in Only One Woman

The International Society of Blood Transfusion recognized a new blood type this month. The new addition, now the 48th recognized blood type, was discovered by scientists at the French Blood Establishment from a sample drawn around 15 years ago. So far, only one woman, from whom the sample originated, has been known to have it. Scientists have named the blood group “Gwada negative” after the patient’s homeland, the Caribbean island of Guadeloupe,...