An antibody is a protein used by the immune system to identify and neutralise foreign objects like bacteria and viruses. Each antibody recognises a specific antigen unique to its target. Production of antibodies is referred to as the humoral immune system.
Rudolf Ludwig Carl Virchow was born on October 13, 1821 in the town of Schivelbein, in the German Kingdom of Prussia. Today the town is called Åwidwin and lies in Poland. His father was Carl Christian Siegfried Virchow, a farmer, and town treasurer of Schivelbein; his mother was Johanna Maria Hesse.
A Habsburg Ruler. Rudolph, a member of the House of Habsburg, was born in Vienna on July 18, 1552. The Habsburg family held the crowns of Bohemia, Hungary, and Croatia; it was also the family that ruled the Holy Roman Empire. At the age of twenty, Rudolph became the King of Hungary and Croatia.