Friedrich Theodor von Frerichs (1819-1885)
Professor Friedrich Theodor von Frerichs was
Ehrlich's strongest supporter at the Berlin Charite University Hospital.
He introduced a little laboratory of clinical chemistry where Ehrlich
could work very freely on dye staining of blood. Unfortunately Professor
Frerichs died very early and his successor did not support Ehrlich and
"non-necessary" research. He wanted to urge Ehrlich to see
patients rather than doing research. Ehrlich had to leave.