Since thimerosol has been largely removed from vaccines in the US since 2001, this study of 72 newborn infants was conducted at the Hospital Durand in Buenos Aires, Argentina. In Argentina, like many countries of the world, vaccines are purchased through sources supported by the World Health Organization and the WHO has rejected the notion that thimerosol in vaccines is unsafe. This is the third and final study by Dr. Pichichero and his colleagues that tested mercury levels following the injection of vaccines containing thimersol. Previous studies were conducted on term newborns, and on 2-and 6-month old infants. In those studies, the researchers also found the mercury levels in the vaccinated children were very low and quickly returned to pre-vaccine levels, usually within three to seven days. In 1999, when the first concerns about thimerosol in vaccines was raised, it was presumed that the ethyl mercury in thimerosol would behave in the same manner as methyl mercury in fish after ingested. The three NIH-supported studies clearly refuted that idea.

Dr. Pichichero and colleagues concluded that with this latest data, it is time to recognize that the risk of exposure to thimerosol in vaccines is minimal to non-existent. "The H1N1 vaccine is safe and should be given to those at risk as recommended by the US Centers for Disease Control", Dr. Pichichero said.

Source: Rochester General Research Institute