The word VIRUS is derived from a Latin word meaning "Poison". This use of word goes back to many hundreds of years, long before anyone really knew what a virus was, or that it even existed as we know it today.It was generally believed that these "Viruses". or Poisons, were carried in the air and could cause many unexplained diseases.
By the late 19th century pioneer biologists had demonstrated that many diseases of man and other organism were caused by bacteria. Some diseases puzzled them. Once such disease was found to occur in tobacco plants. It causes the leaves to winkle and become mottled. The mottled effect has the appearance of a mosaic. and the disease was called Tobacco Mosaic Disease.
By the late 19th century pioneer biologists had demonstrated that many diseases of man and other organism were caused by bacteria. Some diseases puzzled them. Once such disease was found to occur in tobacco plants. It causes the leaves to winkle and become mottled. The mottled effect has the appearance of a mosaic. and the disease was called Tobacco Mosaic Disease.
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