Most of the American diet is comprised of calories from ultraprocessed foods, which have been linked to a myriad of poor health outcomes and are a key target in health secretary Robert F. Kennedy Jr.’s agenda to Make America Health Again.

Americans get about 55% of our calories from tasty, cheap — and unhealthy — manufactured foods, the latest data from CDC says. For kids, the percentage is even higher.

The Department of Health and Human Services (HHS) announced on Tuesday that Health Secretary Robert F. Kennedy Jr. has canceled nearly $500 million in grants and contracts for the development of messenger RNA (mRNA) vaccines.

The Trump administration cancelled about $500 million for research into mRNA vaccines. The move slows progress in using the technology to prevent a future pandemic or treat disease, experts say.

The U.S. Department of Health and Human Services said on Tuesday it would wind down mRNA vaccine development activities under its biomedical research unit.