A new flu vaccine has been approved for use in adults 50 and older in the US. This vaccine is the first of its kind to use mRNA technology, similar to that used in many COVID-19 vaccines. The vaccine was developed by Moderna and approved by the US Food and Drug Administration.

It has faced a challenging path to approval, with initial funding cuts and a rejected review request. Further details about the vaccine and its development are available from the source, including information about the technology used and the approval process.