The printer generates vaccine-filled microneedle patches that can be stored long-term at room temperature and applied to the skin Peer-Reviewed Publicationimage: Inside the printer, a robotic arm injects ink into microneedle molds, and a vacuum chamber below the mold sucks the ink down to the bottom. view more Credit: MIT CAMBRIDGE, MA -- Getting vaccines to people who need them isn’t always easy. “The ink composition was key in stabilizing mRNA vaccines, but the ink can contain various types of vaccines or even drugs, allowing for flexibility and modularity in what can be delivered using this microneedle platform,” Jaklenec says