Painless microneedle patch could replace needles
It's only a matter of time before drugs are administered via patches with painless microneedles instead of unpleasant injections. But designers need to balance the need for flexible, comfortable-to-wear material with effective microneedle penetration of the skin. Swedish researchers say they may have cracked the problem....

https://www.sciencedaily.com/releases/2016/12/161212084453.htm
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