I have an extremely rare blood type — I’m the only person in the world with it

Talk about a lonely hearts club. An unidentified woman from Guadeloupe has the rarest blood type on Earth, to the extent that she’s only compatible with herself. The 68-year-old is thus far the only known member of the blood group “Gwada negative,” according to news reports. The moniker comes from the colloquial name for the French Caribbean island the woman calls home. Scientists with the French Blood Establishment (EFS), who discovered Gwada...