Dr. Boyd Haley (chemist) clarifies the mercury/vaccine issues.

His four entertaining and brief videos, as his interviews:

Haley explains how injected mercury is much more dangerous than mercury
solution taken orally, as the major heavy metal defenses are in the GI
tract.  Without those defenses, when injected, extremely small amounts of
mercury can damage the neurological system.  He states that safety tests
were lacking on vaccines, and that the guinea pigs were the children of the
US.  Much more.

It is heartening to see a science of and for the people, supported by
scientists and journalists.

-Jim West
My "Pesticides And Polio" website (10 years-old site) was 
recently destroyed without warning by

Still, my research can be found in many locations, however, by googling "Jim
West", "polio".