“She is undoubtedly the only known case in the world,” said Thierry Peyrard, a medical biologist at Établissement français du ...

The ABO-Rh system of blood group typing is an immensely successful method that helps medical professionals safely perform blood transfusions throughout the world.

Scientists discover world’s rarest blood group, found in just one person - Her blood is so unique that doctors couldn’t find ...

New Blood Type Discovered in France — And Offers a Breakthrough in Transfusion Medicine Researchers identify the world’s 48th blood group system after a rare case stumps doctors.

In June 2025, ISBT delegates in Milan unanimously agreed to classify Emm as a new and independent blood group system, now officially known as ISBT042. Most people recognize their blood type by its ABO ...

Severe acute respiratory syndrome coronavirus 2 is a novel virus, and it is indeterminate whether blood groups have any impact on COVID-19 susceptibility or progression. Therefore, we investigated the ...

A 68-year-old woman from Guadeloupe has been confirmed as the sole known carrier of a newly discovered blood group named ‘Gwada negative’. Officially recognised as the 48th blood group system by the ...

No A, B, AB, O or rare Rh variant fit. The Paris hospital called in specialists, who ran the sample again and still drew blanks. Fourteen years later, that puzzling vial has rewritten the textbooks.

Now, scientists say the woman is the only known carrier of a new blood type called “Gwada negative.” It’s the only blood type within a new blood group system that scientists have dubbed “PigZ,” which ...

If blood of the Rh-positive grandmothers induced primary sensitization in their daughters, there would be an increase in the number of affected grandchildren over the control group.

The ABO blood group system was first discovered in the early 1900s. Thanks to DNA sequencing, the discovery of new blood groups has accelerated in recent years.