Virus Discovery

A new means of filtering solutions had been developed during the 1880s at the Pasteur Institute that would effectively remove minute bacterial cells from suspensions. However, Russian scientist Dimitri Ivanowsky in 1892 found that tobacco plants were still susceptible to infectious attack by a filtered suspension. This observation led to a conclusion that even smaller and hitherto unknown viral particles were present. Martinus W. Beijerinck produced a similar set of findings independently.

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