Who Needs Needles?: Needle-less vaccination systems are not perfect. Many can’t regulate depth of the drug or vary the amount dispensed. Now, there’s a new solution: powdered drugs and a magnetic system. Currently, needle-free systems use small bursts to vaporize a liquid and push it into the body. This new system uses a magnet and small piston as the injector allowing the depth of delivery can be varied by varying the current in the magnet. Combined with a vibratory system — to energize the powder so it will “behave in a similar way to a fluid” — will allow the needle-less system the same utility as our classic methods. Additionally, powdered drugs would make refrigeration of drugs unnecessary, a big plus for workers in parts of the world without reliable, accessible refrigeration. via New Scientist