Virus vs. Worms: Know the Difference

Viruses can corrupt data and disrupt system functionality.

A Worm is a standalone malware that replicates across networks.

A Virus is malware that attaches to other programs and replicates.

It does not require a host file or program to propagate.

A Virus can be spread through email attachments or downloads.

Worms can install backdoors for further cyber attacks.

Any of various submicroscopic agents that infect living organisms, often causing disease, and that consist of a single or double strand of RNA or DNA surrounded by a protein coat. Unable to replicate without a host cell, viruses are typically not considered living organisms.

Worms often exploit network vulnerabilities to spread.

A disease caused by a virus.

They can consume bandwidth and slow down network performance.

A computer program or series of commands that can replicate itself and that spreads by inserting copies of itself into other files or programs which users later transfer to other computers. Viruses usually have a harmful effect, as in erasing all the data on a disk.

Plural of worm

A harmful or destructive influence

A submicroscopic, non-cellular structure consisting of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and often causes disease in the host organism; such agents are often classed as nonliving infectious particles and less often as microorganisms.

(uncountable) A quantity of such infectious agents

A disease caused by such an infectious agent; a viral illness.

(archaic) Venom, as produced by a poisonous animal etc.

(computing) A type of malware which can covertly transmit itself between computers via networks (especially the Internet) or removable storage such as disks, often causing damage to systems and data; also computer virus.

Any type of malware.

(figurative) Any malicious or dangerous entity that spreads from one place or person to another.

To send or infect an electronic device with a computer virus.

Contagious or poisonous matter, as of specific ulcers, the bite of snakes, etc.; - applied to organic poisons.

The causative agent of a disease, .

Any of numerous submicroscopic complex organic objects which have genetic material and may be considered as living organisms but have no proper cell membrane, and thus cannot by themselves perform metabolic processes, requiring entry into a host cell in order to multiply. The simplest viruses have no lipid envelope and may be considered as complex aggregates of molecules, sometimes only a nucleic acid (DNA or RNA) and a coat protein. They are sometimes viewed as being on the borderline between living and nonliving objects. They are smaller than living cells in size, usually between 20 and 300 nm; thus they pass through standard filters, and were previously referred to as filterable virus. The manifestations of disease caused by multiplication of viruses in cells may be due to destruction of the cells caused by subversion of the cellular metabolic processes by the virus, or by synthesis of a virus-specific toxin. Viruses may infect animals, plants, or microorganisms; those infecting bacteria are also called bacteriophages. Certain bacteriophages may be non-destructive and benign in the host; - see bacteriophage.

Fig.: Any morbid corrupting quality in intellectual or moral conditions; something that poisons the mind or the soul; as, the virus of obscene books.

A program or segment of program code that may make copies of itself (replicate), attach itself to other programs, and perform unwanted actions within a computer; also called computer virus or virus program. Such programs are almost always introduced into a computer without the knowledge or assent of its owner, and are often malicious, causing destructive actions such as erasing data on disk, but sometime only annoying, causing peculiar objects to appear on the display. The form of sociopathic mental disease that causes a programmer to write such a program has not yet been given a name. Compare trojan horse{3}.

(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein

A harmful or corrupting agency;

A software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer;

It requires a host program to activate and spread.

Antivirus software is essential to detect and remove Viruses.