Now i will talk you about Rudolf Virchow, the creator of the celular theory of patology. Why this is so important? Well, this theory is one of the bases of the modern medicine paradigm with, for example, the microbiotical theory about deseases.
Virchow was born at 1821 in Schivelbein, Pusia. Studied medicine in the Beril University. He become main teacher of the anatopathology class in Würzburg University. He was too a Prusian parlamen member, there he built a remarcable politic carrer.
Virchow main improvement to medicine was the celular theory of pathology, which mean that everething that happens to the body have a celular cause, and a celular final effect, in Virchow words: "No importa cuántas vueltas le demos, al final siempre regresaremos a la célula." Which means, It doesn't matter how much we think about it, in the end we will always end up talking about cells.
The Virchow theory is still valid. Of course, now there is much more information available, like genetic knowledge, for example. These new insights are paving the way to make a more complete explanation to the Virchow theory, not refuting it.