All times in UTC ·
Dashed edge = started before, or continues beyond, this day
Events on Saturday 26 June 1943 1
1868 – 1943Karl Landsteiner (1868-1943)Died 26 June 1943, aged 75Karl Landsteiner was an Austrian-American pathologist who discovered the ABO blood groups, which made safe blood transfusion possible. He received the 1930 Nobel Prize in Physiology or Medicine. He later co-discovered the Rh factor.