Editing Archaeogenetics (section)

=== Ludwik Hirszfeld (1884–1954) ===
[[Ludwik Hirszfeld]] was a Polish [[microbiologist]] and [[serologist]] who was the President of the Blood Group Section of the Second International Congress of Blood Transfusion. He founded [[blood group]] inheritance with Erich von Dungern in 1910, and contributed to it greatly throughout his life.<ref name=":12">{{Cite journal|last=Steffen|first=Katrin|date=2013|title=Experts and the Modernization of the Nation: The Arena of Public Health in Poland in the First Half of the Twentieth Century|jstor=43819610|journal=Jahrbücher für Geschichte Osteuropas|volume=61|issue=4|pages=574–90|doi=10.25162/jgo-2013-0036 |s2cid=252447493 }}</ref> He studied [[ABO blood groups]]. In one of his studies in 1919, Hirszfeld documented the ABO blood groups and hair color of people at the Macedonian front, leading to his discovery that the hair color and blood type had no correlation. In addition to that he observed that there was a decrease of blood group A from western Europe to India and the opposite for blood group B. He hypothesized that the east-to-west blood group ratio stemmed from two blood groups consisting of mainly A or B mutating from blood group O, and mixing through migration or intermingling.<ref name=":12" /> A majority of his work was researching the links of blood types to sex, disease, climate, age, social class, and race. His work led him to discover that [[peptic ulcer]] was more dominant in blood group O, and that AB blood type mothers had a high male-to-female birth ratio.<ref>{{Cite journal|last=Allan|first=T. M.|date=1963|title=Hirszfeld and the ABO Blood Groups|jstor=25565348|journal=British Journal of Preventive and Social Medicine|volume=17|issue=4|pages=166–71|doi=10.1136/jech.17.4.166|pmid=14074161|pmc=1058915}}</ref>