While at this point there is still significant controversy over whether or not thimerosal in vaccines causes adverse health effects in humans, it is important to note that in 1991 the World Health Organization (WHO) concluded that a safe level of mercury exposure below which no adverse effects occur, had never been established.
While at this point there is still significant controversy over whether or not thimerosal in vaccines causes adverse health effects in humans, it is important to note that in 1991 the World Health Organization (WHO) concluded that a safe level of mercury exposure below which no adverse effects occur, had never been established.