Washington: Massachusetts Institute of Technology (MIT) engineers have found a way of harnessing ultrasound waves for non-invasive drug delivery or needle-free vaccinations.Ultrasound - sound waves with frequencies greater than the upper limit of human hearing - can increase skin permeability by lightly wearing away the top layer of the skin, an effect that is transient and pain-free."This could be used for topical drugs such as steroids - cortisol, for example - systemic drugs and proteins such as insulin, as well as antigens for vaccination, among many others," says Carl Schoellhammer, MIT graduate student in chemical engineering and co-author of the study, the Journal of Controlled Release reports.
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