What ingredient specifically scares you in the flu vaccine and why?

Originally posted on Dr. Jen Gunter:
Dangerous ingredients, like toxins, antifreeze, and mercury, are touted by many as reasons to decline vaccination against influenza. However, toxin is an inaccurate term regarding vaccines (a toxin is a poisonous substance made by cells or organisms and is definitely not in any vaccine), mercury is a non issue (see…