[the advent of mobile vaccine printers facilitates long-term storage of vaccines at room temperature and delivery through the skin] FIFA, April 25 (FAP)-- vaccination for all people who need the vaccine is not easy. Many vaccines need to be refrigerated, making it difficult to transport them to remote areas where infrastructure is lacking. Scientists at the Massachusetts Institute of Technology have successfully developed a mobile vaccine printer that can produce hundreds of doses of vaccine in a day, according to a study published on the 24th in the journal Nature Biotechnology. The printer can produce a heat-stable COVID-19 RNA vaccine, and the immune response in mice is similar to that of RNA vaccine.