Hempt was born on September 21, 1874, in Novi Sad (then under the
Austro-Hungarian monarchy) as son of a
Belgian Protestant missionary and Katarina Tewely, originally from
Budapest. The family soon moved to
Sarajevo where he finished his primary studies. As the family was not wealthy enough to pay for his studies, he started studying medicine in Graz and Munich as military medic. Henry earned his medical diploma on the
University of Graz in 1898. As an aspiring medic, he started working in the same year in
Vienna in the First Garrison Hospital. After that, he was moved to a cavalry garrison next to Vienna. During this, he married Maria Winkler in 1903. His first son was also born here in 1904. After demobilization, they moved to Lukavac, where ha worked as a doctor. In Bosnia, he gained experience in trying to heal different diseases including rabies. In that time, Pasteur Institutes were established in Belgrade, Budapest and Niš, but most of the people were not traveling to these cities, and the existing vaccination was not transportable. During
World War I, he was a commander of a hospital in
Trieste. After that, he worked in
Bosnia; in 1921, he returned to Novi Sad, accepting the invitation of the Serbian Minister of Health
Andrija Štampar. Here, he founded a Pasteur Institute and became the first director of the same. The institute was producing Pasteur's vaccine against rabies, and provided information to the people about prevention. Hempt published his modifications to the vaccine against rabies in 1925, which was accepted on a medical conference in
Paris in 1927. After that, the vaccine was produced according to his technology all around Europe. This so-called inactive or "dead vaccines" were produced in Europe to the end of 1980s, and are still used in
India and some developing countries. He died in 1943 in Novi Sad, where he is buried in the old Protestant graveyard. A memorial tablet in his memory was erected in the Pasteur Institute in his remembrance. For his work he was rewarded with the medal of St Sava. Since 2002, the street where his family house was is named after him, Dr. Hempt Street. ==Contribution to medicine==