Dose-sparing skin-patch vaccine against Japanese encephalitis

Photo taken on Jan. 5, 2022, in the northern Japan city of Sapporo shows a skin-patch vaccine against Japanese encephalitis, developed by a research group led by Hiroaki Iwata of Hokkaido University Hospital. The 1.5-centimeter diameter patch with 109 microneedles could cut the amount of vaccine used to a 10th of that required by a subcutaneous injection to produce the same efficacy outcome, according to the research.