[officialjunk]

it's known well in the countries that have nasal vaccines already. one can only speculate about the united states.

i can see benefits to touting 94+% efficacy for the intramuscular vaccines (with the fine print that efficacy is only measuring reduction of severe infection), because it does help prevent hospitalizations and deaths. i think it would be difficult to convince a population to vaccinate while saying it doesn't prevent infection.

[officialjunk]

the good news is we will have a nasal vaccine that will prevent a whole class of colds/flus, maybe in a decade or so.