Thimerosal is 49.6% mercury by weight. For comparison, imagine a mercury thermometer; it is also approximately half mercury, although that amount will increase as the temperature rises, and the mercury fills the glass.
This extraordinary substance was added to vaccines in the 1930s to prevent bacterial growth. There had been several serious incidences of death from infected vaccines, and thimerosal did a wonderful job of keeping people alive long enough for the vaccination to take effect.
An unusual, but considered highly beneficial, side effect of thimerosal in vaccines was the commensurate decline in tooth decay over the years. Dentists have long used mercury in dental fillings, and some think that the addition of mercury to vaccines dramatically increased the levels of mercury in people’s bodies, allowing it to be incorporated into their teeth, thus preventing tooth decay.
Mercury is excreted by the body through the hair. Babies with rapid hair growth will develop a red tinge to their hair several weeks after vaccination. The effect is more pronounced in hot countries, as the mercury rises faster in the body in warmer temperatures.
Thimerosal has been proven beyond doubt to be a chemical substance. It began to fall out of favor when it was discovered that it could be blamed for autism. While the causes of autism are still not well understood, all chemicals are harmful and certainly should not be given to babies, and the development of autism so soon after vaccination surely can’t be a coincidence.