‼️Breaking: New Blood Type Discovered, Guada Negatve — And Only One Person In The World Has It

French scientists have made a remarkable discovery, identifying a completely new human blood type, “Guada Negative.” Found in a woman from Guadeloupe, a French Caribbean island, she is currently the only known individual in the world with this blood type.

Confirmed in 2025 by France’s national blood agency, this marks the 48th officially recognized blood group system. Though initially flagged in 2011, researchers have now fully decoded its unique genetic structure.

A double dose of a rare genetic mutation, inherited from both parents, has left this woman in the medically extraordinary position of being the only person in the world who can receive blood from herself.

The research team first met the woman in 2011, when she was living in Paris and undergoing routine tests before a surgery. But the tests couldn’t reveal her blood type or any matches for it

What makes “Guada Negative” extraordinary?

The individual’s red blood cells carry a genetic mutation rendering her blood incompatible with all other known blood types, meaning she can only receive her own blood.

Experts say finding rare blood types is key to better medical care, especially for people with special genes. Therefore, researchers have undertaken a global mission to identify additional individuals who may possess this rare blood marker, with the objective of enhancing support for patients with rare blood needs worldwide.

The Significance of This Discovery

Beyond the widely recognized ABO and Rh systems, the classification of human blood groups is far more intricate.

Beyond common blood types, there are hundreds of minor ones, like Kell and Duffy.

These lesser-known blood group systems are crucial in various scenarios:

• This aids in preventing blood transfusion reactions, managing pregnancy complications, and understanding certain rare medical conditions.

“Guada Negative” represents just one such rare blood group. This new blood type is super rare, found in only a few people worldwide. It shows we need more research into blood.

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Future Implications

The discovery of “Guada Negative” presents new challenges for blood donation and transfusion protocols. Its extreme rarity suggests limited compatibility with other blood types, raising the risk of severe immune reactions if mismatched.

This finding also:
The discovery paves the way for new research into genetic diversity and rare diseases. Additionally it reinforces the critical role of genetic analysis in transfusion medicine and highlights the importance of expanding global blood group databases.

Finding this new blood type shows we need better tests and personal care for patients.