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From their website:

“Hektoen International invites you to send an essay of under 1600 words on the subject of Blood. The contest honors the achievements of the Red Cross, locally, nationally, and globally. We will consider essays on pioneers in hematology (such as Herrick, Minot, Murphy, Whipple, or Landsteiner), the history of venesection, barber surgeons, the use of leeches, and vampires; as well as historical aspects of blood transfusion, artificial blood, blood groups, blood preservation and blood banks, blood in surgery, blood diseases (such as pernicious anemia, sickle-cell disease, thalassemia, leukemias, and hemophilia), and the history and work of the Red Cross. Two prizes will be awarded — one $3000 prize for the winner and one $800 prize for the runner up. Articles should be submitted by January 15, 2020.”