A virus is an obligate intracellular parasitic acellular microorganism, consisting of protein coat and nucleic acid DNA or RNA and may be enveloped or not. It is a particle that is not defined as being alive, that goes inside you and attacks your cells, and inserts their DNA into your cell, so that your cell makes more of the virus instead of making more of itself.
If you mean in computers, its when malicious code is running in your computer and doing damage. Just like a biological virus, Computer Viruses alter existing code and produce more copies of itself. But it is just computer code and not anything that is alive. If you have this, you should run antivirus software or get help from a computer professional.
Particles are not alive. Parasites are. A virus is in between. We call it non-life. It is neither living (by biological definition), nor is it dead. This is the "new Biology" as we are seeing it. (Some of us went to school a few years back and things were different.) A virus is classified as non-life to distinguish it from living things. A virus cannot reproduce itself outside a host cell. That is one of the reasons for it being classified as non-life.
a protein-coated molecule consisting of nucleic acid, either DNA or RNA
Simply said, a virus particle is a particle from a virus. This be the nucleic acid, or a protein coat
Viruses are programs which are created deliberately to damage critical information and data
A Virion.
Virion
A virion.
virus
virus
a virus
A Virion.
A virus is a particle with DNA but no nucleus or cell wall.
no metabolism
Virion
it will enter from air
A virion.
A virus or a prion.
virus
Virus
It is called a virus.
virus