28 listopada 2008
On 28 November 2008, President of the Republic of Poland Mr  Lech Kaczyński met in the Presidential Palace with Professor Hilary Koprowski, a doctor and inventor of the world’s first ever polio vaccine.  

Hilary Koprowski – a doctor of medicine, virologist ad immunologist, member of the Polish Academy of Sciences, professor extraordinary of the Thomas Jefferson University. Professor Koprowski was awarded the Commander Cross with the Star of the Order of Poland Reborn.