Researchers no longer want to inject vaccines, but spray them on the nasal mucosa. In this way, they could not only protect against severe courses, but also against a broad infection. But the development is tricky.
Imagine someone trying to break into your home. Which makes more sense: fending off the intruder at the front door? Or let him in first and then look for him in every single room from a distance?
In case you are wondering what this comparison is about: It is about our corona vaccines. The injections in the arm can prevent serious Covid 19 diseases, but not that you get infected at all. One reason for this gap in vaccination protection could be the location at which the injection is applied. Some scientists now want to change that and let the vaccinations work where the virus gains access to the body: in the nose.
