Alexa , most of the sickness come and go , without vaccinations. It just vanishes by it self , when they started vaccinations , some times it would cause the sickness to break out again. Just think about it you are putting the sickness into your body and your body has to fight it !
AS for being still healthy is a false claim , people have all sorts of health problem , that may or may not be linked to those nasty ingredients !
the list it long.

As for the mercury, aluminum , can take up to 20 - 30 years to even harm you, because like I said before it will accumulate in your body and cause problems much later in life.
Of course it will effect people differently , not everybody is the same!