Robert F. Kennedy Jr. announced in a statement Tuesday that 22 projects, totaling $500 million, to develop vaccines using mRNA technology will be halted. He noted mRNA technology offers potential advantages of rapid production, crucial in the event of a new pandemic that requires a new vaccine. “It’s certainly saved millions of lives,” Offit said of the existing mRNA vaccines. When RFK Jr. announced he would cut funds from Gavi, the Vaccine Alliance, he cited “vaccine safety,” referring to a 2017 study from Guinea-Bissau. Moderna, which was studying a combination COVID-19 and flu mRNA shot, had said it believed mRNA could speed up production of flu shots compared with traditional vaccines.