A long list of medical experts are saying Robert F. Kennedy Jr.'s decision to cut mRNA research will set back the country’s vaccine science by a decade.

The U.S. Department of Health and Human Services will cancel contracts and pull funding for some vaccines that are being developed to fight respiratory viruses like COVID-19 and the flu, specifically targeting vaccines that use mRNA technology.

This week, President Donald Trump called Operation Warp Speed, a public-private federal program that helped speed up the development and distribution of mRNA Covid-19 vaccines in record time “one of the most incredible things ever done in this country.