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Viruses are the smallest of all the microbes A virus is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein. Sometimes the capsid is surrounded by an additional spikey coat called the envelope.  They are unique because they are only alive and able to multiply inside the cells of other living things. Virus spreads by physical contact or through air.

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| Where Did Viruses Come From?

There is much debate among virologists about this question. Three main hypotheses have been articulated: 1. The progressive, or escape, hypothesis states that viruses arose from genetic elements that gained the ability to move between cells; 2. the regressive, or reduction, hypothesis asserts that viruses are remnants of cellular organisms; and 3. the virus-first hypothesis states that viruses predate or coevolved with their current cellular hosts.

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The evolutionary history of viruses remains unclear. Some researchers hypothesize that viruses evolved from mobile genetic elements that gained the ability to move between cells. Other researchers postulate that viruses evolved from more complex organisms that lost the ability to replicate independently.

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| Virus Affects Human Body Immunity, it weakens our immune system making us vulnerable to various diseases. A virus effect may cause Headaches, cold, cough, infected respiratory system, Fever, Diarrhea, Body cramps, fatigue, weakness, drowsiness, body-ache and many more

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| The Lytic Cycle:
During the lytic cycle of virulent phage, the bacteriophage takes over the cell, reproduces new phages, and destroys the cell. There are five stages in the bacteriophage lytic cycle.

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| The Lysogenic Cycle: During the lysogenic cycle, instead of killing the host, the phage genome integrates into the bacterial chromosome and becomes part of the host. The integrated phage genome is called a prophage.

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| A computer virus is a type of malicious code or program written to alter the way a computer operates and is designed to spread from one computer to another. A virus operates by inserting or attaching itself to a legitimate program or document that supports macros in order to execute its code

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| Computer viruses are programed by humans who hack and want to take all information of the victom like bank detalis and personal Items and may be willing to threten the victom  .

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| Life Cycle of Computer Virus
1.  Dormant phase - The user downloads or acquires an infected file
2. Propagation phase - The user executes the infected  file
3. Triggering phase - The user/system triggers the virus via a system event.
4. Execution phase. - The virus is now executing it's payload.

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| Loss of Data, Loss of Hardware/Software, Loss of Informtion, Financial Loss, Intellectual Property loss. Loss of Control over Military Assests like Misiles and Radars and Sonars. Loss of Control over Satellite and cellphones, electronic communications. Mass Panic.

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| the consequences of a virus may be fever , weakness in eyes, arms , legs , bones, paralyses and even death othes include cold ,runny nose, dry throte , head ache ,viruls
These also include

smallpox

the common cold and different types of flu

measles, mumps, rubella, chicken pox, and shingles

hepatitis

herpes and cold sores

polio

rabies

Ebola and Hanta fever

HIV, the virus that causes AIDS

Severe acute respiratory syndrome (SARS)

dengue fever, Zika, and Epstein-Barr

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Viruses: What are they, and what do they do?

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Viruses exist almost everywhere, and they can infect any living organism. Here, learn more about viruses, how they work, and how to get protection.

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| Some computer viruses are programmed to harm your computer by damaging programs, deleting files, or reformatting the hard drive. Others simply replicate themselves or flood a network with traffic, making it impossible to perform any internet activity. Even less harmful computer viruses can significantly disrupt your system’s performance, sapping computer memory and causing frequent computer crashes.Your computer may be infected if you recognize any of these malware symptoms:
Slow computer performance
Erratic computer behavior
Unexplained data loss
Frequent computer crashes

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Michelangelo Virus similar to Corona Virus

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Michelangelo Virus similar to Corona Virus

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There was a time — from the late 1980s through the 1990s — that computer viruses could cause a similar paralysis as they made their way from machine to machine, relying on host machines to fuel their rampant replication and freezing the operations of computers around the world. . Industry’s efforts to contain the “Michelangelo” virus that drew its name from the fact it remained dormant until March 6, he birthday of the famed Renaissance artist. The virus disrupted operating systems and once a system was infected, the virus could infect a floppy disk inserted into the machine, and travel to a new machine where it would lay dormant until March 6

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How COVID-19 is similar to the viruses trying to infect your computer

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Professor of Computer Science Megan Squire explains the similarities between computer viruses that can infect your computer and viruses such as coronavirus that is now spreading around the world.

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How Anti-Virus & Firewall Protect Our Computer

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How Anti-Virus & Firewall Protect Our Computer

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A firewall is a standard approach software that protects local computer assets from external threats. It acts as a barrier between the World Wide Web and your network. Firewalls monitor inbound and outbound traffic from computers as well as prevent apprehensive packets from leaving or entering the network. An example of a standard firewall tool is the Windows Firewall in Windows Antivirus software is a cybersecurity mechanism which many PCs and offices use often. Its primary function is to scan, spot, and inhibit any apprehensive or distrustful files and software from getting into the system. Antiviruses thwart a further attack on or damage of the system by deleting or isolating the corrupt file and monitoring traffic on the internet.

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What Is the Difference between Firewall and Antivirus?

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While both a firewall and antivirus is important, there are some differences. Find out what makes each unique by reading what’s inside.