0.5 parts per billion (ppb) mercury = Kills human neuroblastoma cells (Parran et al., Toxicol Sci 2005; 86: 132-140).

2 ppb mercury = U.S. EPA limit for drinking water http://www.epa.gov/safewater/contaminants/index.html#mcls

20 ppb mercury = Neurite membrane structure destroyed (Leong et al., Neuroreport 2001; 12: 733-37).

200 ppb mercury = level in liquid the EPA classifies as hazardous waste. http://www.epa.gov/epaoswer/hazwaste/mercury/regs.htm#hazwaste

25,000 ppb mercury = Concentration of mercury in the Hepatitis B vaccine, administered at birth in the U.S., from 1990-2001.

50,000 ppb Mercury = Concentration of mercury in multi-dose DTaP and Haemophilus B vaccine vials, administered 4 times each in the 1990’s to children at 2, 4, 6, 12 and 18 months of age. Current “preservative” level mercury in multi-dose flu (94% of supply), meningococcal and tetanus (7 and older) vaccines. This can be confirmed by simply analyzing the multi- dose vials.