The group around Shinsaku NAKAGAWA at Osaka University has found that vaccination can be effectively done when replacing injection of vaccines by microneedles embedded in a hyaluronic acid-based cushion which eventually dissolves. The microneedles pierce the outermost layer of skin and dissolve embedded vaccine into the body. Tests with volunteers applying various avian flu and influenza vaccines were successful.

China Bio news release, July 22, 2015