Medical standards body
Appears in 1 story · Last updated Sep 20, 2026
As of September 2026: Ratified MAL as an official blood group system; added JAMA as the 49th system in September 2026
In 1972, blood from a pregnant woman showed red cells missing a surface marker everyone else carried. It took until 2024 to trace that marker to a gene called MAL, establishing a new human blood group system.
Updated Sep 20
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