In 1899, Ladislas Deutsch (Laszlo Detre) (1874–1939) named the hypothetical substances halfway between bacterial constituents and antibodies "substances immunogenes ou antigenes" (antigenic or immunogenic substances).
En 1899, Ladislas Deutsch (Laszlo Detre) (1874–1939) denominou as substancias hipotéticas a medio camiño entre constitíntes bacterianos e anticorpos "substancias inmunóxenas ou antíxenos".