Would the antifreeze aspect have anything to do with this thing needing extreme cold storage shortly before use? Also, do you know which vax uses that stuff, since I’m not sure I want antifreeze injected into my body?
Polyethylene glycol (PEG) is NOT antifreeze. It used in some foods and medical products.
Ethylene glycol is used as antifreeze and it is poison. Many modern antifreezes do not have Ethylene glycol because of that. I had a dog that drank a puddle of water someone drainws out of their radiator. The dog died. It shuts down the kidneys. The antidote is the alcohol in drinks. We didn't know that could have saved the dog's life.