MELISSA GOLDIN , AP; FACT FOCUS: RFK Jr.'s reasons for cutting mRNA vaccine not supported by evidence

"Although mRNA vaccines saved millions of lives during the COVID-19 pandemic, U.S. Health Secretary Robert F. Kennedy Jr. incorrectly argued they are ineffective to justify the Department of Health and Human Service’s recent decision to cancel $500 millionin government-funded research projects to develop new vaccines using the technology.

The longtime vaccine critic said in an X video posted Tuesday evening that mRNA vaccines do not adequately prevent upper respiratory infections such as COVID-19 and the flu, advocating instead for the development vaccines that use other processes.

COVID-19 is the only virus for which real-world data on mRNA vaccine effectiveness is currently available, as mRNA vaccines for other diseases, including the flu, are still under development. The two scientists whose discoveries enabled the creation of mRNA vaccines against COVID-19 won a Nobel Prize in 2023 for their work."