A new vaccine delivery system that spares patients the pain of an injection has been invented by a Japanese professor.
The device developed by Kanji Takada, a professor of pharmacokinetics at Kyoto Pharmaceutical University, can deliver drugs to the body without breaking the dermis layer of skin.
The delivery system uses a round vaccine "chip" measuring just 1.5cm in diameter, which contains as many as 300 micro needles each measuring 0.5mm long and 0.3mm wide at the base.
The needles penetrate just 0.5mm into the skin before they dissolve and administer the vaccine. The patient feels no discomfort and there is no bleeding.
This new injection system could be available for use in hospitals in Japan within two years, according to Telegraph.co.uk.