FDA Approves Moderna's mFLUSIVA, First mRNA Flu Vaccine for Adults 50 and Older
The U.S. Food and Drug Administration (FDA) has approved mFLUSIVA (mRNA-1010), Moderna's mRNA-based influenza vaccine, for adults aged 50 years and older. This marks the first mRNA flu vaccine to receive FDA approval. The approval for adults aged 50 through 64 years is traditional, while for those 65 and older, it was granted through an accelerated pathway, requiring further confirmatory evidence of clinical benefit. The pivotal FLUENT phase 3 trial, which involved over 40,000 adults aged 50 and above, demonstrated that mFLUSIVA had a 26.6% greater relative efficacy against confirmed influenza-like illness compared to a licensed standard-dose influenza vaccine. The mRNA technology instructs cells to train the immune system, and its manufacturing process does not require the propagation of vaccine viruses in eggs, potentially allowing for faster production closer to the flu season. Side effects reported for mFLUSIVA are similar to other vaccines, including mild reactions such as fatigue, muscle and joint ac...