I share your thoughts and purposely ask the employees how do they keep the Vax so cold. The initial BS line fed to us was that the mystery juice injections had to be super cold per the CDC:

Store vaccine vials upright in the tray and protect from light. Before mixing, the vaccine may be stored in an ultra-cold freezer between -90°C and -60°C (-130°F and -76°F).

I've asked a few at CVS and they look at me like I'm speaking Klingon.

I also worry about the people injecting the mystery juice. 95% of them must be convinced that they are HELPING people, not poisoning them. That's some really heavy guilt to bear and I pray for their safety and mental health once they learn.