Have research studies looked at the risk of cancer in children whose mothers received SV40-contaminated polio vaccine?
Yes, two studies concerning maternal vaccination with SV40-contaminated vaccines and risk of cancer in offspring have been conducted. Each study reported an association. 1. Heinonen et al. reported a higher incidence of neural malignancies in children born to mothers who received inactivated poliovirus during pregnancy. The prospective study of over 50,000 women who were pregnant between 1959-1965 identified 24 malignancies in their children during the first 4 years of life. The rate of malignancy was about two-fold greater in children born to mothers immunized during pregnancy when compared with children born to unimmunized mothers or mothers who received influenza or OPV vaccines. Neural tumors accounted for most of the difference. 2. Farwell et al. found that of 15 cases of medulloblastoma in children born in Connecticut between 1956-1962, 10 were born to mothers exposed to SV40 contaminated polio vaccine while 5 were born to mothers unexposed. Interpretation of these results, howev
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