Right, because we need even MORE ways to vax people without them possibly knowing. Archive: https://archive.today/QNwbm From the post: >>Flossing may be good for more than getting your dentist off your back—one day, it may also protect you from the flu. In an unorthodox approach to needle-free vaccines, researchers have developed a special kind of floss that can deliver proteins and inactive viruses to mice’s gumlines and trigger immune responses that protect against infectious disease, they report today in Nature Biomedical Engineering.