The microneedle vaccines would be administered using a simple cheap spring-loaded device.

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Coupling the display to the bi-stable spring allows the accessory device to be easily worn in a number of convenient locations.

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They plan to start manufacturing the device next spring.

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The device, if it passes clinical testing that begins this spring, would be a boon for patients with wide, short or steeply angled abdominal aortas.

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