[debono]

? You need to read more, 
That is nasal inhibitor, need to take if they go out. It is quick solution, little risk but cannot do too long.

Nasal vaccine works similar to jab vaccine, will wane as well but provide what Jab cannot protect
most venerable entry point the nose.
Also it is very small quantity compare to jab version, risk is expected to be very much lower.

Vaccine jab can last for 6 months....