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.

Neither UTMB nor Moderna has confirmed the nature of the project included in the announcement, or how much funding is being lost.

The Trump administration’s decision to terminate hundreds of millions of dollars to develop mRNA vaccines and treatments imperils the country’s ability to fight future pandemics and is built on false or misleading claims about the technology,