For those of you who don't know, a Powder Puff nasal injection which pushes empty Norovirus shells into your system to prevent you catching Norovirus may be available within five years. Here is an extract:

"A vaccine that provides immunity for the ‘winter vomiting bug' norovirus could be available within five years, claim American scientists.A group of rival scientists from Arizona State University and the LigoCyte Pharmaceutical company are both working on a vaccine which is close to being tested in clinical trials.
The vaccine, unlike conventional vaccine jabs, wouldn’t be injected into the bloodstream but sprayed, or 'puffed' into the nose in the form of a light liquid or dry powder.
Once inside the nostrils, the powder would trigger an immune response when the norovirus hits the stomach."