evidence: exceeded this threshold many times over. Federal health officials have not conceded that this amount of thimerosal in vaccines exceeded the FDA's more relaxed threshold of 0.4 micrograms per kilogram of body weight. In most cases, however, it clearly did. [...] For a 22-pound baby (ten kilograms), the threshold would be 1 microgram. The DTP (and DTaP) vaccine contained 25 micrograms of thimerosal per dose, as does the Hepatitis B vaccine. [...] The EPA's threshold is 0.1 micrograms per kilogram of body weight. For an eleven-pound baby, the EPA's safe threshold would be 0.5 micrograms. Although thimerosal has been removed from these vaccines today in the United States, in the 1990's, Aventis Pasteur's DTaP vaccine contained 25 micrograms of thimerosal. GlaxoSmithKline's Hepatitis B vaccine contained 12.5 micrograms of thimerosal. Wyeth