Microneedles: a new way to deliver vaccines

摘要

Described as a hybrid between a hypodermic needle and a transdermal patch, microneedles are tiny needles (less than 1mm) made of polymer, metal, silicon, glass or ceramic. Anywhere from one to thousands of needles are fixed to a baseplate or backing layer. The vaccine or drug is generally placed in or on the microneedle tip.