Virus are tiny organisms that can only replicate inside a living `host`. It can only reproduce in the living `cell` of another organism. A virus when outside the living `host` is called `Virion` and it contains the genetic materials (`DNA` or `RNA`), `Capsid`. The virus is much more smaller than a bacteria cell. 

![bacteriophage-309497_960_720.png](https://cdn.steemitimages.com/DQmZBYM4w2pckcP3E6NzTAwwe5yMt6TWhw3vS1LyDYC2EQi/bacteriophage-309497_960_720.png) [Source](https://pixabay.com/en/bacteriophage-virus-phage-medicine-309497/)
A lot of diseases are caused by viruses. Examples include `AIDS` `Ebola` and so on. Virus structure can be helical, icosahedral, complex or enveloped.<hr/><center>

![HEDE](https://ipfs.busy.org/ipfs/QmPX2QfjakbqWoRZza4U9ByttziVwZtSZaija1dK1UoV6X)

Posted on HEDE - A dictionary for sharing knowledge in a friendly way<br/><center>Read <a href="https://hede.io/hede-io/@zoneboy/virus">this entry</a> or <a href="https://hede.io/virus--2145">all entries about virus.</a></center><hr/>