Scientists gave mice flu vaccines by flossing their tiny teeth — and it worked

Scientists developed a novel vaccine delivery method using dental floss coated with inactive flu viruses. Tested on mice, the floss-based vaccine triggered strong immune responses throughout the body and in mucous membranes, with all vaccinated mice surviving exposure to active flu virus. This needle-free approach could potentially simplify vaccine distribution and administration, especially in resource-limited settings or during outbreaks.