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Saturday, October 24, 2009

Why is someone who has previously received a tetanus shot given a tetanus booster,and one who hasnt antiserum?


Answer:
To answer your question (and it would seem I'm the only one who has) a tetanus booster is given to those who have been previously vaccinated because it "reminds" the body how to produce the necessary antibodies. These people have produced their own antibodies and are said to have active immunization. The antiserum may be given to those who have not been vaccinated because the anitserum already contains antibodies and provides passive immunization for someone who may have been exposed to the bacteria and needs antibodies now.
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A tetanus shot is only good for a certain amount of years, then you need a new one ( a booster )
Not all vaccinations provide lifelong immunity. Many need boosters to keep prompting your body to create the antibodies to the illness they're trying to prevent. Another reason is also that vaccinations interact with environmentals. For instance, a recent article was published that showed children in the Faroe Islands who had PCB's in their bloodsystem from whale blubber were at risk for a much reduced benefit from vaccinations. The PCB's literally prevented their bodies from mounting a sufficient reaction to the vaccine to create immunity to illness.

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