While the move came as a surprise to the high-profile vaccine maker, it is just the latest hostility toward vaccines-and mRNA vaccines in particular-from an agency overseen by the fervent anti-vaccine activist Robert F. Kennedy Jr. In his first year in office, Kennedy has already dramatically slashed childhood vaccine recommendations and canceled $500 million in research funding for mRNA vaccines against potential pandemic threats.
The news is the latest sign of the FDA's heightened scrutiny of vaccines under Health Secretary Robert F. Kennedy Jr., particularly those using mRNA technology, which he has criticized before and after becoming the nation's top health official. Moderna received what's called a "refusal-to-file" letter from the FDA that objected to how it conducted a 40,000-person clinical trial comparing its new vaccine to one of the standard flu shots used today.
Each day, they pore over reams of data about how the virus is evolving worldwide, how well last year's shot performed, and which strains might be easiest to mass produce for a vaccine. The meeting, convened by the World Health Organization twice a year, is a critical moment for the WHO's Global Influenza Surveillance and Response System.