Another post from the Clinical Trials Abundance blog, this time by Ruxandra Teslo, on how the recent refusal-to-file by the US FDA for Moderna’s new mRNA influenza vaccine increases regulatory uncertainty and threatens innovation across the entire biotechnology sector. The decision reportedly came after the country’s top vaccine regulator, Dr. Vinay Prasad, overruled career staff to quash Moderna’s application. This is just one more blow against mRNA vaccine technology to come from Health and Human services, the US federal health agency led by the world’s most prominent antivaxxer, Robert F. Kennedy Jr.