how do virus replicate?
913135
They latch onto one of your cells. Suck out the DNA. Insert their own DNA and a new virus cell is born.
1040546
the virus likes to mutate. so even if they did have one.. it wouldn't work for very long
126567
In computer security technology, a virus is a self-replicating program that spreads by inserting copies of itself into other executable code or documents. A computer virus behaves in a way similar to a biological virus, which spreads by inserting itself into living cells. Extending the analogy, the insertion of a virus into the program is termed as an infection, and the infected file (or executable code that is not part of a file) is called a host. \n\nIn the context of computer software, a Trojan horse is a malicious program that is disguised as legitimate software. The term is derived from the classical myth of the Trojan horse. In the siege of Troy, the Greeks left a large wooden horse outside the city. The Trojans were convinced that it was a gift, and moved the horse to a place within the city walls. It turned out that the horse was hollow, containing Greek soldiers who opened the city gates of Troy at night, making it possible for the Greek army to pillage the city. Trojan horse programs work in a similar way: they may look useful or interesting (or at the very least harmless) to an unsuspecting user, but are actually harmful when executed.\n\nA computer worm is a self-replicating computer program, similar to a computer virus. A virus attaches itself to, and becomes part of, another executable program; however, a worm is self-contained and does not need to be part of another program to propagate itself. \n\nhttp://en.wikipedia.org/wiki/Computer_virus
1022070
it doesnt....it just doesnt reproduce. Now, the body can get rid of certain infections on its own which is where the virus load actually decreases.Hope that was helpful. I'm sure you were expecting some big long drawn out answer which I could give you about how antibodies in the body work....but thats not what you asked.
848216
A virus does not fulfill the minimal criteria of life.\nA virus is a chemical construct, as others had said before, it is not capable of reproducing itself.\nA chromosome is a very large collection of chemicals, it may be very similar to a virus. It is part of a living organism, by itself, it is not. \nA virus may 'attack' cells and force them to replicate itself, a chromosome doesn't do that; it doesn't have to. You could think of a chromosome as a virus having found its perfect spot; it no longer has to invade cells...
146220
Cells have a lot of different genes that control their growth, and these genes are all copied when a cell divides.  Sometimes, there's a "typo" during the copying process, and there's a mutation in one of those genes controlling cell growth.  The cell can then become cancerous and grow out of control.  \n\nThe specifics may differ in different cases, but that's the general way.  Viruses can cause cancer by changing the DNA of a cell they are infecting, in a way that alters one of these growth-controlling genes.  Toxins can cause cancer by making a cell more likely to make a mistake, or "typo", in the genetic code.
501520
Dudes!  That's not correct.\n\nA virus is a self replicating piece of code that tries to send itself to other peoples computers.  It does not have to do anything other than that.  They are not always malicious, but most do something to make their presence known.  This could range from deleting all your files, to simply displaying a pop up.  Spammers make a lot of viruses that secretly turn your machine into mass emailers.  You never see anything on the screen and they don't pop up anything.  You just notice your machine running a little slower than usual.\n\nSpyware does not self replicate.  You get it by visiting web sites, like this one, that put stuff like cookies on your computer.  The cookies are used to track your browsing habits.  There are other spyware programs as well that can be installed from any kind of active code in a web site.  Most primary cookies are harmless, but third party cookies are the ones to watch out for.  They are almost always spyware.
65045
A virus is a microscopic parasite that infects cells in biological organisms. Viruses are obligate intracellular parasites; they can reproduce only by invading and controlling other cells as they lack the cellular machinery for self-reproduction. The term virus usually refers to those particles that infect eukaryotes (multi-celled organisms and many single-celled organisms), whilst the term bacteriophage or phage is used to describe those infecting prokaryotes (bacteria and bacteria-like organisms lacking a nucleus). Typically these particles carry a small amount of nucleic acid (either DNA or RNA, but not both) surrounded by some form of protective coat consisting of proteins, lipids, glycoproteins or a combination. Importantly, viral genomes code not only for the proteins needed to package its genetic material, but for proteins needed by the virus during its life cycle (the term "life cycle" is used loosely here—see #Living or non-living?).
968040
If you think you can remove  virus by using system restore to the previous day before the infection, Forget it it doesn't work that way.\n You need to run your anti virus and see it the problem can be resolved,  If it doesn't you may have to download a better anti virus or go to a link that has specialty tools to help remove it.
655409
There is no easy way to explain this.\nSo I suggest you read up this\nhttp://en.wikipedia.org/wiki/Computer_virus
517165
Viruses are not free-living...they depend on the host cell machinery to keep them "alive" and allow them to replicate.  Therefore, the only way to cultivate viruses in the laboratory is to grow them in tissue/cell cultures.  You can then allow the tissue/cell culture to incubate and isolate the viruses at a later time.\n\nI don't know what viruses in particular you're asking about, but if you are trying to grow bacteriophage, you can plate the phage suspension on a lawn of bacteria and allow plaques (areas of clearing where the phage have killed the bacteria) to form and then cultivate the viruses from there.
201261
Yes, viruses cannot direct their movement and are essentially inanimate until they make contact with a host cell.
384001
You could use a virus to kill another virus, however the problem is the DNA programming.  Viruses are programmed to survive.  Therefore they must replicate themselves.  \n\nThey rewrite the DNA data in human cells to make more viruses.  In this fashion they "hijack" the cells to be factories to propagate themselves.\n\nIt would be possible to make a virus attack another.  The first thing would be to make the virus "seek" the type of thing it would need to "attack".  This is assuming we develop the tech to engineer viruses(Scary thought).  Once something like that was created, it wouldn't be far off to start engineering human DNA, but that's a different question. :)  \n\nProbably the best way to have virus "hunter" would be to have the virus rewrite the DNA of it's prey into something harmless.  The virus would also need a way to replicate itself without hurting the host.  So most probably that would involve a type of artifical replication outside the host.\n\nBefore all of this is "invented" I believe nanotechnology will be prefected.  Why engineer viruses when you can build small machines the same size to do your bidding?  They could kill viruses and rebuild damaged tissue at the same time!  Technology like this really isn't too far off.  In the next 50 to 100years from what I understand, it would be commonplace, or even sooner.
65416
Definitely the easiest way is to grab something that someone else has written and modify it a little.  In the "biz", people that do this are known as "script kiddies" since they don't have any real knowledge but only how to follow a script.\n\nMost more "original" viruses exploit an existing problem with an existing program or operating system.  Quite often it's due to a "buffer overrun" vulnerability, where the OS allows an application to overwrite memory that doesn't belong to it.  If you're careful, you can overwrite the memory in such a way that the system will interpret it as operating instructions and execute it.  Once you can get it to do that, the system is pwned!!1!
910641
all viruses work by taking over the reproductive mechanism of cells and making them manufacture copies of themselves.  Frequently the viral cells put out toxins that cause various illnesses.  "Stomach" viruses do this in the GI tract.
26355
In computers, a virus is a program or programming code that replicates by being copied or initiating its copying to another program, computer boot sector or document. Viruses can be transmitted as attachments to an e-mail note or in a downloaded file, or be present on a diskette or CD. The immediate source of the e-mail note, downloaded file, or diskette you've received is usually unaware that it contains a virus. Some viruses wreak their effect as soon as their code is executed; other viruses lie dormant until circumstances cause their code to be executed by the computer. Some viruses are benign or playful in intent and effect ("Happy Birthday, Ludwig!") and some can be quite harmful, erasing data or causing your hard disk to require reformatting. A virus that replicates itself by resending itself as an e-mail attachment or as part of a network message is known as a worm.\n\nGenerally, there are three main classes of viruses: \nFile infectors\nSystem or boot-record infectors\nMacro viruses
1001099
sometimes, depending on the matter, there can be viruses.