[[One 6 oz can of white chunk tuna contains about 52 micrograms of mercury (in the form of methyl mercury)
http://www.pbs.org/now/science/mercuryin…;
Flu vaccines contain 25 micrograms of mercury (in the form of ethyl mercury).
“25 µg/0.5 ml dose”
http://www.fda.gov/BiologicsBloodVaccine…;
]]
http://answers.yahoo.com/question/index?qid=20091017183743AAybmGw
The mercury does not seem like a big deal, nor even the “booster” (although it may be).
I suspect the quality control of the private, for profit, company, however is superior to that of the communist Eurpoe version.
No other reason to have a two-tiered system.