Contrary to widely held beliefs, most 10-year-old children with negative or unknown varicella (chickenpox) histories are actually immune to chickenpox.
Investigators from Laval University in Quebec assessed the age-specific incidence of chickenpox in over 2000 fourth grade students. A subset of children with negative or unknown chickenpox histories were tested for anti-varicella antibodies.
The study was performed to determine the proportion of children that would need to be vaccinated in a catch-up program.
The reported cumulative incidence of chickenpox at 10 years of age was 92%. Furthermore, about half of the children developed chickenpox before entering kindergarten.
Of the children with negative or unknown chickenpox histories, 63% had antibodies against the virus.
Prevaccination testing could identify children who are immune, but such testing could be difficult to implement and might reduce vaccine coverage.
Pediatric Infectious Disease Journal November 2001;20:1087-1088
Another piece of evidence from what is considered perhaps the most well respected pediatric infection journal supporting the insanity of continuing to provide chicken pox vaccines.
The vast majority of children who do not get chickenpox vaccine wind up immune to chickenpox anyway. At least that is the way it was prior to widespread immunization with the vaccine.
Who knows what effect the vaccine will have on the prevalence of the wild virus to provide a truly effective and permanent immune response.
We know that about 75% of those that are vaccinated can still get chickenpox. Translation: The vaccine doesn't work very well.
Yet for those who never even remember having chickenpox, 2/3 of them were protected. Translation: Most who come down with chickenpox have such a mild condition they don't even know they had the disease.
However, please note that you don't have to have the rash to have an immune protective response. If you are healthy you may not have any symptoms other than a mild fever and runny nose.
Thanks to Dawn Richardson from PROVE for forwarding these studies.
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