Infectious diseases are caused by viruses, bacteria and parasitic organisms such as amoeba. A vaccine is something given to a person to illiect an immune response, so that if they become infected with than disease, it won't be nearly as bad.
Vaccines work by introducing the surface protein (antigen) of the bacteria or virus into the blood stream in a deactivated form, so that the immune system can produce antibodies to be kept in the memory cells. The problem is there is a high mutation rate amoungst antigens as the organisms try to outwit the immune system. HIV and Influenza have a very high mutation rate which makes a vaccine hard to make - there is a new flu vaccine each year, and this year in brittain they started to produce one, then found out that the flu had changed so had to make a second. There is going to be a shortfall of the number of doses required.
Some bacteria have avoided the problem all together by covering themselves with a thick waxy coat, meaning there are no antigens that can induce an immune response.
Some bacteria are really very virulent and just overwhelm the immune system, meaning there is no chance for the immune sytem to respond - vaccinated or not. Finally some just attack the immune system itself such as Chlamydia pneumoniae, Mycobacterium avium, Legionella pneumophila and Listeria pneumophila. They all live inside immune cells to reproduce, so a vaccine would not work against them.
On top of these scientific reasons, there are other ones as well. Time constraints - all the relevant scientists could focus of vaccines for diseases, but those people who currently have them, would like them to find treatments....
It dose take many many years to be able to introduce vaccines for widespread use. Just one reason why animal testing is good.
I hope this explains it well enough. Feel free to e-mail me if you would like more info or stuff explained.
2006-10-03 21:16:12
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answer #1
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answered by Bacteria Boy 4
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Do NOT get vaccinated.
A vaccinated person is MORE likely to get a disease than a non-vaccinated person. The whole theory of vaccination is flawed. It causes a weakening of the immune system thus making those who are innoculated more susceptible to disease.
There are so many awful side effects to vaccination that it should be considered extremely dangerous.
Just sit back and think for a while.
Is there any sense in injecting a disease directly into the bloodstream.
We have been subjected to an awful mind control program to enable the drug manufacturers to make a fortune.
The Vaccination Hoax
http://www.whale.to/b/hoax1.html
If you go to the vaccination liberation web page, at
http://www.vaclib.org/exemption.htm
You will find all the forms necessary to provide exemption for your child.
If you want to study the history of vaccination, see
http://dgwa1.fortunecity.com/body/vaccination.html
2006-10-06 16:45:48
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answer #2
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answered by Anonymous
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There are a variety of reasons.
One good example is the vaccine for lyme disease.
It was out for about two years, turned out it was the immune reaction to the bacteria that caused the disease.
They took it off the market because the vaccine gave the disease.
2006-10-03 17:03:43
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answer #3
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answered by Anonymous
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Becoz all bacteria and viruses and their mode of infection is different,,,,,,, for all infectious disease vaccines are going to be prepared
2006-10-03 17:49:28
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answer #4
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answered by Anonymous
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maximum vaccine-preventable ailments are brought about by potential of germs that are referred to as “viruses” or “micro organism.” Vaccines to help ward off those ailments oftentimes incorporate weakened or killed viruses or micro organism particular to the ailment. Vaccines help your physique understand and combat those germs and look after you each and every time you return in touch with somebody who's unwell with any of those ailments.
2016-10-15 12:07:59
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answer #5
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answered by ? 4
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just resting my eyes ......
umm we're workin on it.
Before all the cures can be found the diseases change and new cures for the old disease have to be found.
It's like trying to read every book in a public library. If the books are filed alphebetically by the time you get to the c's they got half a dozen new books filed before what youve already read.
2006-10-03 16:34:46
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answer #6
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answered by Grev 4
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there are some diseases that have a extremely hard genetic code to crack with our day and age technology. plus there would be a serious budget problem in the country.
2006-10-03 16:33:32
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answer #7
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answered by wickboom333 2
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get a phd, figure it out, and win a nobel prize
2006-10-03 17:22:32
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answer #8
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answered by abcdefghijk 4
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because viruses evolve and mutate
2006-10-03 16:30:31
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answer #9
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answered by Tony_Dimo 1
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more money is made that way.....
2006-10-03 16:25:24
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answer #10
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answered by Anonymous
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