Watch: Why isn’t there a nasal vaccine for COVID yet?

If we want to prevent mild Covid infections, we’re going to need vaccines that protect us where infections start: in the mucus membranes of the nose, mouth, and throat. And for that, we’re likely going to need intranasal vaccines.

A number of research groups and companies are working on Covid-19 vaccines that would be delivered intranasally, but the development process is tricky. Watch the explainer above to learn more.