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Thimerosal Content in Some US-Licensed Vaccines
1 A concentration of 1:10 000 is equivalent to a 0.01 concentration. Thimerosal is approximately 50% Hg by weight. A 1:10 000 concentration contains 25 μg of Hg per 0.5 mL.
2 A previously marketed lyophilized preparation contained .005% thimerosal.
3 COMVAX is not approved for use under 6 weeks of age because of decreased response to the Hib component.
4 ProHIBit is recommended by the Academy only for children 12 months of age and older.
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