Video encyclopedia



Flu Virus 101 | National Geographic


Martin Garrix & MOTi - Virus (How About Now) [Original Mix]


What is a Virus? | Breakthrough


Cell vs. virus: A battle for health - Shannon Stiles



A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 virus species have been described in detail, of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology.
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  • Etymology 

  • History 

  • Origins 

  • Microbiology 

  • Classification 

  • Role in human disease 

  • Infection in other species 

  • Role in aquatic ecosystems 

  • Role in evolution 

  • Applications