Daniila Samoilovich, Russian epidemiologist. Daniila Samoilovich was burn in 1742. He graduated from Saint Petersburg, the capital of Russia in times of Catherine the Great. After this he worked hard as a doctor and in 1768 he set out to the Russian-Turkish war. There he became an epidemiologist. He put many efforts to reduce the decease in the army. And he achieved this purpose successfully. At that time he met the plague. He knew four languages: Latin, Polish, French and of course Russian. But due to the needed to has well communications with locals, he learned Moldavian. Then he figured out that the plague is transmitting not through the air, but through the deceased stuff. Because of this misconception people performed some folly actions such as cutting a trees, shooting a cannon, ringing the bells. They had an opinion that it helps the air to move. He worked too hard and then he got ill. But the order to his relocation to back was delayed for a few months. But instead of the relocation to any calm place he was addressed straight to Moscow, where raged the plague epidemic that was achieved its peak in this year. It was in 1771. But it is the another story about the heroism of Russian medics.