The pain-free needle

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Imagine you’re about to get a shot at the doctor’s office.
Instead of feeling a painful prick as the needle goes in, you watch it touch your skin but feel nothing.
That’s how a revolutionary new needle works: It first injects you with a tiny amount of local anesthetic, which masks the pain inflicted by the bigger needle.
Okay, so the first injection is not entirely painless, but “virtually pain-free,” says the BBC.  more...