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Old 02-09-2012, 09:50 AM   #11
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Re: Recent research about chicken pox vaccine?

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No info here either.

But, whenever any of my daycare kids gets the chicken pox, almost all of the kids who were vaccinated still get CP anyway. Granted, they all get a mild case, and it would probably go unnoticed if I weren't watching for it.

I still preferred not to vaccinate my daughter when she was younger... mostly because at that time, it was brand new, and I just don't trust vaccines for the first few years. I'd rather take a wait and see how everybody else does approach.

I've never seen anything bad about the CP vaccine yet. But, I'd still probably opt against it.
The sucky thing is, once in public school, even if it's a mild case, they still can't be in school. So they are required to be vaccinated with something that doesn't guarantee they won't get it anyway and then are treated to same as unvaccinated kids if they do get it. They whole process is completely broken and makes me

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Old 02-09-2012, 11:20 AM   #12
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Re: Recent research about chicken pox vaccine?

http://www2.aap.org/immunization/ill...hickenpox.html

http://www.cdc.gov/vaccines/vpd-vac/...la/default.htm

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Is waning immunity a problem with the varicella-containing vaccines?

The length of protection/immunity from varicella-containing vaccines remains unknown. Available data from follow-up of children vaccinated in prelicensure clinical trials indicate that protection from varicella vaccine lasts for at least 25 years (Japanese data) and 14 years (U.S. data). However, most of the data concerning vaccine efficacy and persistence of antibody in vaccinees are based on research that was conducted when natural varicella infection was highly prevalent and had not been affected by wide use of the vaccine. A recently published community-based study among children 12 months to 12 years of age suggests that 1 dose vaccine-induced immunity to varicella may wane over time. Experience with other live viral vaccines (e.g., measles, rubella), however, has shown that post vaccination, immunity remains high throughout life. For these vaccines, second doses are needed to cover the small percentage of people who fail to seroconvert after the first dose (primary vaccine failure). Follow-up studies are continuing to assess levels of immunity in vaccinees as disease incidence declines.
http://www.sciencedaily.com/releases...1204092443.htm

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The study, the largest of its kind, used electronic health records to identify more than 170,000 children vaccinated with the varicella (chicken pox) vaccine from 2002 to 2008 in Kaiser Permanente's Southern California region, then followed children for an average of two and a half years to identify the occurrence of herpes zoster.

Researchers found only 122 cases of herpes zoster among the 172,163 vaccinated children, for an estimated incidence of 1 case per 3,700 vaccinated children per year. This is a lower rate compared to what one would expect in the unvaccinated children based on previous experiences.
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Old 02-09-2012, 11:28 AM   #13
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Re: Recent research about chicken pox vaccine?

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Dd got that and is in 1st grade she's now had chicken pox twice, both times it was fairly mild but still, twice? My friends son had it once a year through elementary school after receiving the vax.
On a lighter note, the health dept sent all parents a letter home yesterday here, our school has had 7 reported cases of hand foot and mouth in less than a week. SO I guess we shouldn't be surprised if Dd gets that next.
Funny how most people say you can only get it once...lol...I have had it not one, not two but THREE times. Once in preschool (I remember being miserable), once in elementary(mild, just a few spots) and once as a teenager. As a teenager it was SEVERE. I missed school for over a month. We went ahead and got that particular vax for our kids. Hopefully if they do get it, it will be mild. Hubby also lost a good part of his vision after he had the chicken pox too.
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Old 02-09-2012, 12:18 PM   #14
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Re: Recent research about chicken pox vaccine?

My kids haven't had the vax or the pox. I would much prefer for them to get the infection naturally, but I'll have to re-evaluate when we get to adolescence if they haven't had it by then.

I don't think it's a particularly dangerous vax; my issue with it has more to do with lack of necessity for most individuals and the problems caused by its widespread use (namely, a predicted -- and observed -- increase in zoster infections). One thing to consider, however, is that if you get your child vaccinated and he immediately returns to school in the midst of an outbreak, the only thing you're accomplishing for sure is getting him back in the door. The vaccine may or may not have any effect on whether he catches the pox from that exposure.

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I don't understand this at all. The authors of the survey followed children for "an average of two and a half years" after vaccination, or after that 2002-2008 period? If it's the former, I can't imagine how they took from that the conclusion that the vaccine conferred some added protection against zoster. 2.5 years is still well within the window of peak immunity, so of course the vaccinated kids were less vulnerable to zoster in that time. The only way they wouldn't be was if they were immunocompromised or simply failed to seroconvert. That says nothing about what may have happened when their immunity started to wane.

Then that number is compared to the number of "expected" cases of zoster in unvaccinated children. But did they limit that to unvaccinated children who had been infected with varicella within that same 2.5-year average time period? Or, at the very least, to cases in children before the vaccine came into widespread use? Because otherwise it was apples to oranges and there is no way to draw that conclusion with any validity, no matter how large this survey was.
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Old 02-09-2012, 02:17 PM   #15
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Re: Recent research about chicken pox vaccine?

My assumption, without reading the study, is that the number of shingles in people who had chicken pox in the previous 2 years is a pretty well known number. So they looked at the rates of shingles in vaccinated children and compared.
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Old 02-10-2012, 12:11 AM   #16
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Re: Recent research about chicken pox vaccine?

My oldest daughter was born in 1997 and it was new them. She recieved both doses and has never gotten the chicken pox, shingles or anything of that nature. She also was in daycare from 3yrs old till 9years old and always in public school as well. So she was exposed to it but the vaccine worked. My 2DD & 3DD also have had the vaccine but I do SAH with them although they do go the gym daycare when I work out and my 2DD is in kindergarten still no chicken pox here.
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