Tweet from EricTopol at October 20, 2022 at 11:57AM

Vaccination alone did not induce neutralizing activity in the nasal mucosa, but that was achieved via breakthrough infections.
“These observations… .motivate the development and evaluation of a next generation of vaccines administered intranasally.” https://t.co/XIaSiKDJ7R

— Eric Topol (@EricTopol)
Oct 20, 2022

from http://twitter.com/EricTopol