There actually are several adverse effects associated with certain ingredients in vaccines, such as Thinersol.

Vaccines can also be easily made without these ingredients so there's really no need in the first place.

The results of the present examination of the VAERS show a significant relationship between the Thimerosal-containing childhood vaccines evaluated and childhood neurodevelopmental disorders. The data demonstrate that a significant risk factor for the development of neurodevelopmental disorders was the amount of mercury children received from Thimerosal-containing childhood immunizations. Taken collectively, the increased risk associated with all seven neurodevelopmental disorders examined, any of which could independently be an indicator of possible mercury toxicity, proffers significant evidence for an association between the Thimerosal-containing vaccines evaluated in the present study and neurodevelopmental disorders based on this controlled assessment of VAERS.