The Vaccination injects what we think of as a dead disease into you. You white blood cells then produce antibodies that can kill/get rid of the disease. So now if you ever catch the disease you have been vaccinated against your body already has the correct type of antibodies to fight it off -- So without even knowing it the disease will hit yu and be gone as quick as you can say toast!
There are 2 types of vaccines:
(1) Live ("attenuated", or bred to be harmless)
(2) Killed (dead disease-causing particles)
Live vaccines can be more effective, don't usually need 'booster' shots later to make them work better, but are less able to be given to immunocompromised or pregnant people as they are still alive.
Killed vaccines are less effective, often requiring boosters, but can be given to immunocompromised people and (often) pregnant ladies. They are used with an "adjuvant", or a substance that helps them work better (makes your body more able to make antibodies to them faster).
Both types of vaccines have 'epitopes', or molecules that your body recognises. These epitopes are the SAME as what is on the actual disease-causing particles. This is why they work - your body sees the "HARMLESS" particles and learns to recognise them, or creates "antibodies" that help your body respond to the actual thing when it appears.
It takes time to create these antibodies, so if you can make them BEFORE the actual disease finds its way into your body, you can respond much faster and destroy the virus particles before they can cause you harm.
The type of vaccine depends on what has been developed. There are benefits of both ways, but it is not always easy to do both.
Side note: occasionally, you will hear about how "vaccines are horrible, and cause more harm than good". Most of the time, people use multi-resistant organisms as examples, however, these organisms become resistant to ANTIBIOTICS, and NOT vaccines! Having antibodies is natural, unlike many antibiotics! They are NOT comparable! Antibodies are a post-infection method of disease control, whereas vaccines prevent the disease from establishing. Thus, vaccines have in the past been used rather successfully to rid the world of several diseases! (Which we can ALL be extremely grateful for!!!!!)
Another poorly-used example was that of the smallpox vaccine causing many deaths. Reasons why this example is tragically misused is that it was the first-ever attempt at vaccination in recorded history (we no longer live in such an age where we must rely on random human-testing of live NON-attenuated pathogen injection!). Smallpox protection included injecting pus from the lesions of an infected person (or another vaccinated person) to create antibodies.
Case in point: we no longer inject pus into people... it's a good way to spread other infections, and is less reliable in results. We no longer live in the 'dark ages' of immunology. The first attempts at reaching space failed badly, and yet nobody seems to be boycotting space travel now that science and technology has improved, so please be open-minded if anyone ever tells you that in vaccines, in general, are "bad". Okay? :)
The person is injected with dead or inactive cells so they can build antibodies against the infection so if live infection enters the body it has the right antibody to destroy it.
A vaccination is basically a training course for the immune system, so when the real disease shows up the immune system already know how to deal with it and prevent it from having any effect.
Because there is a population that has not been vaccinated against it. It is a viral disease, spread person to person. Vaccination prevents transmission of the disease.
I DONT NKOW
vaccination
by vaccination
The act or practice of inoculating someone with a vaccine as a protection against disease is called a vaccination. This is used to build immunity to specific diseases that could be detrimental to society and to the person who is not vaccinated.
Vaccination entails giving the person a weakened form of the disease. This triggers the body's immune system to build up antibodies to the disease. Then if the real disease tries to attack the body, it is already ready to fight back.
No it can not.
The vaccination process is intended to boost the immune system against infectious diseases and similar problems by introducing a small quantity of the disease to the immune system, so it knows what to look for and how to fight it. However, vaccination does not make you immune, so always exercise as much caution as possible in a situation in which you might be at risk of contracting an infectious disease.
Possibly, but not as bad as if you were not vaccinated. Vaccination is an injection of the disease you wish not to catch. This is done so your body will develop the needed, reactive antibodies to the disease in question. The injected form of the disease has been modified so that it is not as powerful and won't do as much damage as the one you are preventing, but reactions in people differ and reactions to this inoculations will include the symptoms of the disease. The chances of a reaction depend on the person who is injected. When you get a cold does it hit you hard and you are down for awhile? That might be an indication of how your internal protection system works and you should prepare yourself for experiencing the symptoms of the vaccine.
You can not prevent it. Cystic Fibrosis is a genetic disease. CF is also not contagious. You couldn't tell a person apart because it does not effect physical features.
Jonas Salk developed the polio vaccination.