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Why are dead or weakened viruses used instead of normal viruses to create a vaccine?
Wiki User
∙ 9y ago
Vaccines are used to build immunity in the recipient. Dead or weakened viruses do the job well. More importantly, it is pointless injecting a full on dose of a virus into someone you are trying to protect against that virus. Dead or inactive pathogens(things that cause disease) are used in vaccines so that they do not harm the patient. However, they still make the immune system of the patient react how it normally would if the pathogen were to infect them.
The purpose of a vaccination is to introduce into the body a sample of the germs that you want to be protected from so that the immune system can react to the germs and create antibodies to stop or kill them without your having to get the disease to gain that immunity. In order to give you a sample of the germs without making you sick from them, they use weakened or dead (inactivated) germs in the vaccine. Your immune system does not know that they would not make you sick, so it reacts as if they would and creates the antibodies that it will keep stored in case you ever do come in contact with the full strength germ later. That is how you develop immunity by using a vaccine instead of by having the disease.
Wiki User
∙ 9y ago
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When you get a vaccine can you get the virus?
There are a few circumstances that can create some risk of getting the virus, such as in people whose immune systems aren't working right (e.g., they recently had cancer chemotherapy or HIV or some other immuno-suppressive disorder). See the list of people in the related question below who should not get vaccinated with the types of vaccines that contain a live "attenuated" virus. Attenuated means weakened. When someone has a weak immune system, they may be susceptible to the weakened form of virus in the vaccine. But they would not be able to be sick from getting vaccines that contain "dead" viruses. With the flu vaccines, for example, the shots have dead viruses in them but the nasal mist has live attenuated viruses in it.Sometimes. If the vaccine is a live attenuated (weakened) vaccine, then you get a dose of virions (viral particles/viruses) that are no longer dangerous to humans as they have been weakened so they can not make you sick. Other vaccines (such as Gardasil) are made with Virus-like particles (VLP) and these are just pieces of the virus (such as the envelope) not actually working and replicating viruses so they can not make you sick either.
What is present in a vaccine to make white bloood cells create antibodies?
A vaccine usually contains a weakened form of the virus, strong enough to trigger your immune response but weak enough to be defeated by it.
What do they put in a vaccine?
They put in dead or biologically weakened bacteria or virus strains that cauase your immune system to create antibodys against theese otherwise virulent pathogens.
Why doesn't immunisation always work?
because the immune system may not be strong enough to create antibodies also when a vaccine is used it could of weakened the immune system ...
How does vaccine relate to the virus that it protect against?
A vaccine is essentially a weakened or dead version of the virus. This essentially "infects" you with the virus and causes the body's immune system to respond and create anti-bodies that will kill the real virus if it does ever get into your system.
What is one part of a research plan that must be followed when developing a new vaccine?
When developing a new vaccine the researchers will need to find out which receptors play a role in the spread of a virus or bacteria, and look at the molecular shape. Vaccines contain bacteria or viruses (microbes) either parts of wholes that have been killed or weakened so they don't causes diseases. These microbes work with the immune system to create antibodies against the bacteria or viruses. So if you are exposed say to Measles the body remembers these bacterias or viruses so the body is able to fight of the diseases quickly and you don't get sick.
Why does a vaccine have to be a specially prepared version of a disease pathogen?
A vaccine is a special version of an antigen the gives you immunity against a disease. A vaccine is a weakened form of disease which helps your immune system create antibodies to fight it off so later if you ever get that certain disease again your body would recognize it and create antibodies to fight against it before it gets too serious.
Can you train your immune system to prevent swine flu?
Yes, this is exactly what the flu shots do. The flu vaccine contains inert ("dead") or weakened pieces of viruses that, when put into the body with a flu shot or nasal mist, trigger an immune system resonse to cause your body to work to create immunity against that particular type of virus. You are tricking or training your body how to create the right cells to attack and save you from getting the exact flu that is in the vaccine without having to have the illness that goes along with exposure to the active ("live") or full strength virus.
Who creates viruses?
Anyone can create viruses!
What describes how a vaccine works?
The contents of vaccines vary, but it usually contains a disease (dead or alive: in weakened or harmless state).
What kind of virus make the host cell create new viruses?
viruses
A vaccine produces its effects by?
A vaccine works by causing the body's immune system to create antibodies against itself. Ideally, the body has such a strong response to the vaccine that it creates memory B cells, which can turn themselves on if the animal is ever exposed to the disease and create a large number of antibodies very quickly.
