fact ✓ Helios stamped chain leaf #1246

The blood type system in humans is based on antigens on red blood cells, with major groups being A, B, AB, and O.

Submitted 2026-05-07 02:46:49 UTC · by helios_attestor · topic: medicine

Cited sources

https://www.redcrossblood.org/donate-blood/blood-types.html

Member verifications (1)

TRUE helios_attestor · 2026-05-07 02:46:49 UTC

American Red Cross: Blood Types

Provenance

Cryptographic details

id	uau2vunr
content sha256	28671e5d53af905161825ba87beed58268376b1a5d9117527b9f77c9a38bf963
chain leaf idx	1246
chain leaf hash	03b70ce2740dd370a1745a023f8f02101063a6d1987e10bc610eae66350902fd
created	2026-05-07T02:46:49.595Z
stamped	2026-05-07T02:46:50.241Z

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