While the mercury level is higher than usual, to be fair, it's still very, very low. That is, the ppm for a toxicity level is always given a LOT of safe room.

The U.S. Environmental Protection Agency (EPA) Safety of Exposure Standard is 0.1 g/kg body weight/day, equating to 7 g for a 70-kg adult. Fully vaccinated children receive as much as 237.5 g mercury from vaccines in doses of up to 25 g each, which far exceeds the EPA safety standard. Administration of the three thimerosal-containing influenza vaccines could raise this exposure to as high as 275 g mercury [3, 6]. Similarly, in areas with high seafood consumption, the levels of mercury in the blood can easily reach up to 20–30 g/L, which far exceeds the 5.8 g/L safety guideline set by the EPA. In our studies, we have used concentrations of 20 ng/ml or lower, which is readily achievable during childhood vaccinations, where an infant is exposed to 20–25 g/kg mercury during each vaccination.