Number Of Siblings Predicts Risk Of Brain Tumors ScienceDaily 12/12/06 "The population-based study, the largest of its kind, analyzed 13,613 brain tumor cases in Sweden. It found people with four or more siblings were twice as likely to develop a brain tumor as people with no siblings..."Since the size of a family and the number of younger siblings correlate with the incidence of brain tumors, this suggests infectious agents may be causing the disease," said study author Andrea Altieri, DSc, with the German Cancer Research Center in Heidelberg, Germany...the finding that brain tumor rates were higher among people with younger siblings, and not older siblings, suggests infections or re-infections in late childhood may play an important role in causing the disease, while exposure to infections in infancy, birth to five months old, may be beneficial"
Could this be more evidence for the viruses help cause some cancers theory? Interesting that they mention that infections from birth to 5 months seem beneficial but those after not so much - possibly harmful.
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