Jan Jánský

Jan Jánský (30 March 1873 in Prague,Czech Republic - 8 September 1921 in Černošice) was a neurologist and psychiatrist. He was the first to divide human blood into the four types (A, B, AB, 0) of the AB0 blood group system. His discovery saved millions of lives.John Malam, A Brief Illustrated History of Science (North Mankato, MN: Capstone Press, 2017), p. 28

 His life 
He studied medicine at Charles University in Prague. From 1899 he worked in a psychiatric clinic. He became a professor at Charles University and a doctor of medicine.Peter D'Adamo; Catherine Whitney, Eat Right 4 Your Type (New York: Riverhead Books, 2002), p. 21

 World war I 
He served as a doctor for 2 years on the front lines.The Neuronal Ceroid Lipofuscinoses (Batten Disease), Second Edition, eds. Sara Mole; Ruth Williams; Hans Goebel (Oxford: Oxford University Press, 2011), p. 12 After suffering a heart attack in 1916, he was dismissed from the army. After that he was in charge of the department of Neurology and Forensic Psychiatry at the Central Military Hospital in Prague.

He suffered from angina pectoris. Jánský died of Coronary artery disease.

 Points of Interest 
Jánský was a promoter of blood donations. Donators of Czech Republic or Slovakia receive a medal. In 1953 he was the subject of a movie directed by Martin Frič.

 References 

Category:Czechoslovak scientists
Category:1873 births
Category:1921 deaths
Category:Deaths from coronary artery disease