In the same way that plants will not grow on soil that lacks some substance indispensable to their growth, so microbes, these microscopic plants whic…

- Elie Metchnikoff

It is possible to state as a general principle that the mesodermic phagocytes, which originally (as in the sponges of our days) acted as digestive ce…

- Elie Metchnikoff

Needless fear and panic over disease and misfortune that seldom materialize are simply bad habits. By proper ventilation and illumination of the mind…

- Elie Metchnikoff

There is only one constant element in immunity, whether innate or acquired, and that is phagocytosis. The extension and importance of this factor can…

- Elie Metchnikoff