Array of Microneedles (IMAGE) American Chemical Society Caption An array of microneedles like this could be coated with medicine and act as a painless drug delivery system for flu vaccines, diseases of the eye and more. Credit Gary Meek. Usage Restrictions None 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.