Where do viruses come from?

How did viruses come to be?

  • Did viruses come before other life forms, and others evolved from viruses. Or did they break off from already existing life form and became what they are ? Is there any research done on this ?

  • Answer:

    A russian pathologist-Dmitri Iwanowski,while studying Tobacco mosaic disease ,filtered the 'sap of diseased tobacco leaf' through a filter which was designed to retain. An infectious agent passed through it.this infectious agent was later discovered and known as "Virus" , for the first time by Martinus Beijerinck.

Shreeya Salunke at Quora Visit the source

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