YOU never notice mosquito bites until it’s too late—because the bite itself is painless. So why not try to mimic the mosquito’s unique “stinger” to make a needle that you won’t feel when it’s taking blood or injecting drugs? That’s precisely what a team of Japanese microengineers has done.
Contrary to popular belief, a mosquito can stab you with its proboscis without you feeling a thing. It then injects anticoagulant saliva to stop your blood clotting while it feeds, and it’s this gunk that carries the bacteria which cause irritation and pain.
Seiji Aoyagi at Kansai University in Osaka…
