Federal vaccine policy changes under RFK Jr. have some concerned health insurance will not cover COVID shots. A bill in NY seeks to mandate coverage.

Moderna Inc. shares are selling off Wednesday, after the Trump administration took aim at the science behind the biotechnology company’s vaccines and said it would cancel some contracts and stop funding mRNA drug development.

US Health and Human Services is “winding down” its mRNA vaccine development and will instead fund other vaccine platforms through the Biomedical Advanced Research and Development Authority, the agency said Tuesday.