What is the history of Virus?

[Hamza1999]

In the modern era of technology still we are used to listen that somebody hacked the website or any other online account or someone's data has been curept due to virus. Why in this modern era we can't get rid of this virus? And what is the basic history of Virus?

 

[Oyeleye42]

The first evidence of the existence of viruses came from experiments with filters that had pores small enough to retain bacteria. In 1892, Dmitri Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered.