The Flucelvax has enough Thimerosal (a type of mercury) that classifies it as a hazardous waste and requires very careful disposal procedures per the State of Michigan.
But totally safe to inject into humans…wonder how much mercury it take to cause autism?
Per the manufacturer.
Flucelvax Quadrivalent 5 mL multi-dose vials contain thimerosal, a mercury derivative, added as a preservative. Each 0.5 mL dose from the multi-dose vial contains 25 mcg mercury.
https://www.drugs.com/pro/flucelvax-quadrivalent.html