Some doses are - some aren’t its a question of the manufacturing process. Make sure your pharmacist is aware of your allergies and they’ll usually have some allergen free stuff on hand.
Yep I work at a hospital, and we are 50 acute beds over capacity already this week and it’s mostly respiratory illness, not even COVID but just pneumonia and such. Unless you really want to try and sleep in a brightly lit hallway on oxygen.
It can 100% help with transmission. It won’t stop it outright, but that doesn’t mean it doesn’t help.
I can’t find reference to it, but in the past I recall seeing communities that vaccinated the majority of the kids in their schools against the flu seeing massively reduced cases.
It makes sense as well, vaccines shorten severity and duration … it makes sense that the viral load and thus the ability for the virus to spread is greatly reduced.