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  • Title: Making sense of epidemiological studies of young children exposed to thimerosal in vaccines.
    Author: Dórea JG.
    Journal: Clin Chim Acta; 2010 Nov 11; 411(21-22):1580-6. PubMed ID: 20638374.
    Abstract:
    OBJECTIVE: To compare epidemiological studies dealing with neurological issues (compatible with Hg toxicity) linked to exposing newborns and infants to intramuscular doses of preservative-Hg resulting from vaccination with thimerosal-containing vaccines (TCV). METHODS: Major databases were searched for studies that addressed neurodevelopment outcomes other than autism. Eight studies were identified and compared. RESULTS: Information extracted from the studies done in the USA, the UK, and Italy is important in understanding the complex interplay of variables but insufficient to establish non-toxicity for infants and young children still receiving TCV: a) there is ambiguity in some studies reporting neurodevelopment outcomes that seem to depend on confounding variables; b) the risk of neurotoxicity due to low doses of thimerosal is plausible at least for susceptible infants; c) there is a need to address these issues in less developed countries still using TCV in pregnant mothers, newborns, and young children. CONCLUSIONS: Since the use of TCV is still inevitable in many countries, this increases the need to protect vulnerable infants and promote actions that strengthen neurodevelopment. Developing countries should intensify campaigns that include breastfeeding among efforts to help prime the central nervous system to tolerate exposure to neurotoxic substances, especially thimerosal-Hg.
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