The four major blood groups are based on whether or not you have two specific antigens — A and B. Doctors call this the ABO Blood Group System. The third kind of antigen is called the Rh factor.

However, groups like MAL and the Er blood system, found in 2022, only impact a small number of people. “The work was difficult because the genetic cases are very rare,” Tilley explained.

The excess [is] going [to be] stored as fat,” Frontini explained. The researchers also ... being studied for the genes coding a specific blood group,” he continued. “The researchers ...

Blood group antigens are proteins on red blood cells ... identify patients and donors with this rare antigen,” Thornton explained.

The four major blood groups are based on whether or not you have two specific antigens — A and B. Doctors call this the ABO Blood Group System. The third kind of antigen is called the Rh factor.