Скачать или смотреть The First Virus Discovered by Scientists

Viruses have existed for billions of years, yet their discovery by science only began in the late 19th century. The first virus ever identified was the tobacco mosaic virus.
The journey to understanding viruses started in 1876 when Adolf Mayer, a German agricultural chemist and director of the Agricultural Experiment Station in Wageningen, described a mysterious leaf-spotting disease affecting tobacco plants. He initially believed bacteria or fungi were responsible, but microscopic examinations and tests revealed no such organisms.
A breakthrough came in 1892 when Russian botanist Dmitri Ivanovsky demonstrated that sap from infected tobacco plants remained infectious even after passing through a bacterial filter. Ivanovsky recognized that he had uncovered something entirely new.