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Viruses (biological)

A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses display a wide diversity of shapes and sizes, called morphologies. Generally viruses are much smaller than bacteria. Most viruses that have been studied have a diameter between 10 and 300 nanometres.

1,710 Questions

Will you get rabies if you eat a animal with rabies?

There is no single shot of rabies vaccination. Three shots of preventive vaccination are given on day 0, 7, 28. Alternately on day 0,28 and after six months. But I will advice to go for five does of anti-rabies vaccine, even if you are protected. The sixth shot may not be taken. But you will take it out of immense fear generated by people around you. Your physician will be forced to give you that shot. You can go for it.

Will hand sanitizer kill norovirus?

The facts and fiction re: alcohol based hand sanitizers. Unless the manufacturer is providing an independent lab test re: the two most common strains of norovirus (feline and murene), you should remain skeptical i.e. the kill claims. Murene strain is extraordinarily difficult to conduct tests for, and very very few manufacturers of hand sanitizers have been able to demonstrate that 62% alcohol could possibly be effective against Norovirus. Alcohol does not penetrate dirty hands. Alcohol evaporates in high temperatures. Alcohol breaks up when stored in high temperatures (which would suggest that it is rendered ineffective). There is a new product on the market, alcohol-free that comes with third party test results i.e. both strains of norovirus. Its very expensive--3x-4x any other hand sanitizer--but the financial cost of a norovirus outbreak on a cruise ship or a hotel is hundreds of thousands of dollars per day. Will hand sanitizers actually prevent a norovirus outbreak? That remains to be seen. Can hand sanitizers mitigate the spread of norovirus? Yes.

Can influenza be a latent virus?

No. Influenza viruses are active. You are infected, so your body creates antibodies that disable the viruses in 7 to 10 days. Then your body eventually removes all of the "dead" ones from your body. Latent viruses, like HIV, hepatitis C, and Herpes viruses, infect you but don't cause evidence of disease until later, sometimes years later, as they lie dormant (latent) hidden in your tissues until the disease they cause eventually manifests.

What is the function of the structural elements of a virus?

Quite simple actually. A protein capsid and genetic material within the capsid and sometimes digestive enzymes to destroy bacterial DNA, for instance ( DNA, T even phages, for instance ). Retroviruses have RNA as their genetic material, so they need reverse transcriptase enzymes to replicate cell DNA from their RNA template. They also can have membranous coat, usually take from a cell they are exiting.

If you are cured of rabies can you get them again?

There is no way to answer this unless you tell what the name of the disease is in your question.

Can a breastfeed baby get the flu?

The baby would be more likely to get it from you, especially if they are under six months old, since they can not take vaccines for influenza until after that age. But the answer is yes, they can get the flu as babies and if they have it, they can give it to others. In fact, since their immune systems are immature, they may be able to spread the virus to others for a period longer than older children and adults can. They are also more susceptible to severe complications of influenza with immature immune systems and lungs. It is recommended that anyone caring for babies under the age of six months get vaccinations so they can not get and spread the virus to the baby and check with your pediatrician about when it is safe to take the baby out into the community.

Can Tamiflu give you the flu?

No. This treatment for the flu contains no ingredients that can give you the flu or any other infectious disease.

What types of herpes are there?

There are actually 8 kinds of Herpes viruses:

HHV1: Causes Oral Herpes blisters.

HHV2: Causes Genital Herpes blisters.

HHV3: Called Herpes Zoster. Is the virus that causes Chickenpox and also Shingles later on.

HHV4: Also known as the Epstein-Barr virus. It causes Mononucleosis.

HHV5: Also known as Cytomegolovirus. It also causes Mononucleosis.

HHV6: Causes Roseola.

HHV7: Closely related to #6 and also causes Roseola.

HHV8: Recently discovered in tumors Kaposis Sarcoma ususlly found in people who have AIDS. It can cause other types of cancers in immunosuppressed people.

How can you stop rabies?

If you mean your pets, you can get vaccinations to prevent it. If you mean avoiding getting it yourself, all I can tell you is to not let an animal with rabies bite or scratch you so the saliva doesn't get into your blood system.

What is a virus and its diseases?

There are three different types of viruses. The first one is Macro Viruses. Macro Viruses use to infect and spread to other files viewed by that software. For example Word and Excel have macros and macro viruses can spread by exploiting these commands. The second type of virus is called Worms. Worms duplicate themselves and use communications such as email to spread. They can look at your email address book and send themselves to users in your address book. The third type of a virus is called Trojan. Trojan Horses are programs that say they perform a particular function but in fact do something different, for real they could infect your computer with a virus or erase your files. Viruses can be stopped by activating an anti-virus program, this allows you to scan all of the files programs and everything else on your computer for viruses, and if it finds some then they will be deleted.

What is the size and shape of the capsid in measles?

Helical capsids are usually formed from one protein that interlocks to form a helix-like structure around the viral genome. They are usually more common among viruses that infect plants, though influenza, measles, mumps and rabies viruses all have helical capsids. They are 120 to 270 nm in diameter.

What does an active virus destroy a cell?

A lytic virus will destroy its' host cell at the end of the lytic cycle.

Is flu a pathogen?

Flu is caused by a pathogen (by viruses) but is not the pathogen itself, flu is the disease the pathogen causes. Flu is short for influenza which is an infectious disease of the respiratory system caused by influenza viruses.

How does a retrovirus differ from other viruses?

A retrovirus transcribes RNA into DNA, whereas a regular virus transcribes DNA into RNA. (:

How is Rabies Cured?

Rabies cannot be cured. It may only be prevented via vaccinations. If a human is bitten by a suspected rabies animal, the vaccination must be administered within 2 hours of the bite so as to produce inhibitory antibodies against the rabies virus. But once a person is infected with rabies, they will be dead within 2 weeks. Rabies has a 100% death rate in non-vaccinated individuals unfortunately...

How do you get the flu when you already got a flu shot?

There are many different types of flu and the seasonal flu shot only prevents three of the most likely to be circulating flu viruses. So if you happened to get exposed to a type of flu that wasn't in the vaccination, then you could get sick from it.


Another reason might be that you caught the flu before you got the flu shot and so there was not time for the shot to work before you got sick.


Another reason might be that you got the shot and then were exposed to the flu before your immune system could give you immunity from the vaccination. It takes around two weeks after getting the vaccination for an adult to have full immunity from it. For children under 10, a series of two vaccinations are needed given approximately a month apart, then it takes another few weeks before the body has developed the full immunity, so exposure during any of those time frames before full immunity can cause illness in those children.

Can a virus only be seen with electron microscope?

Yes. They are too small to be seen with even the best optical microscopes.

What type of virus is influenza?

Influenzavirus A, Group v virus, Orthomyxoviridae, an RNA virus. Specifically:

  • Order: Mononegavirales
  • Family: Orthomyxoviridae
  • Genus/Genera: Influenzavirus A
  • Species/Type: Influenza A virus

See the related questions for more details.
Orthomyxovididae = influenza viruses

Can HIV viruses mutate?

It not only can, but does. According to a July/August 2008 article in Women's Health magazine written by Colleen Oakley, "'Every time the virus is transmitted, it undergoes small changes,' says Patricia Fast, chief medical officer at the International AIDS Vaccine Initiative (IAVI). This means that no two people are infected with exactly the same strain of HIV, making it nearly impossible to create a universal antidote" (98).

What initially causes the flu?

Influenza is caused by a virus infecting the body. The family of RNA viruses that causes influenza in humans is named Orthomyxoviridae.

Flu most often spreads when someone with the flu touches items or people with their unwashed hands. It also is frequently spread through uncovered coughs or sneezes. This allows the respiratory droplets that are projected from the cough/sneeze to contaminate people, things, or surfaces in an approximate area of a 6 foot diameter surrounding the infected person. Always covering your coughs and sneezes helps to contain the spread of the droplets and disease.

Because people with the flu are contagious a day or two before even symptoms appear, they may not be aware of the infection while spreading it. Most healthy adults can fight off influenza in three to seven days, during which time they are capable of transmitting the virus to others. Children can be contagious for up to 10 days or even more. The rule of thumb from the CDC is that you are considered contagious until you go a full 24 hours without a fever (when not taking fever reducing medicines).

You can get the flu particles on your hands and introduced into your body when you touch an item or surface like a telephone, pen or pencil, keyboard, desktop, table or doorknob that has been contaminated. If you then touch your own face, nose, eyes, or mouth, or those of another person, you can move the virus to mucous tissue where it can enter the body to cause infection.

Breathing the air near a person sneezing or coughing may also transmit the virus to you in respiratory droplets you breathe in. The heavier than air droplets usually fall to the ground or surfaces within a six foot diameter, so maintaining that distance from anyone with known influenza or those whose health status you do not know is one way to help avoid catching the virus or their other "germs". Avoid direct physical contact with them like hugging and kissing as well and don't share drinking or eating utensils. See also the related questions below for more information.

What is a normal length of time to have the Flu?

10-14 days depending on the virus itself, in some cases 2-3 weeks are required for the bug to go away.

What are symptoms for rhino virus?

Rhinovirus is a fancy phrase/word for the common cold, therefore you most likely already know the symptoms.

How can viruses be named?

Viruses can be named based on the first host cell that is found infected by the virus and the type of damage caused. Viruses can also be named based upon where they are first discovered geographically (e.g. Semliki Forest Virus, West Nile Virus), for the disease with which they are associated (e.g. Bovine Diarrhea Virus), or they may be given a name that has meaning in the language of the first people afflicted with the virus (e.g. Onyonyong Virus). The naming conventions for viruses are actually quite complicated, and have only recently begun to be simplified by a taxonomy that is based upon the type of nucleic acid, structure of the virion, and replication scheme.

Because viruses are not considered organisms, scientists do not use traditional binomial nomenclature to name them. Currently, scientists name viruses in a variety of ways. Some viruses, such as the polio virus, are named after they disease they cause. Other viruses are named for the organisms they infect. The tobacco mosaic virus, for example, infects plants in the tobacco family. Scientists named the west nile virus after the place in Africa where it was first found. Sometimes, scientists name viruses after people. The Epstein-Barr virus, for example was named for the two scientists who first identified the virus that causes the disease known as mononucleosis, or mono.

So here's the ways.

1. Named after the disease they cause

2. Named for the organisms they infect

3. Named after the place where it was first found

4. Named after people

CREDITS TO: NORTH CAROLINA 8TH GRADE PRENTICE HALL SCIENCE EXPLORER