Microneedle Array Vaccine (IMAGE) University of Pittsburgh Caption The vaccine is delivered into the skin through a fingertip-sized patch of microscopic needles. Credit UPMC Usage Restrictions Release is embargoed until 11 a.m., Thursday, April 2, 2020 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.