Members of the federal vaccine panel chosen by Health Secretary Robert F. Kennedy Jr. are setting their sights on the next targets: the mRNA Covid shots, and vaccines offered to pregnant women.

The panel, called the Advisory Committee on Immunization Practices, already has imposed some limits on access to Covid vaccines and has rescinded recommendations for some routine childhood shots.

Several of the panelists have said — contrary to scientific consensus — that they believe the Covid shots are dangerous and should be taken off the market.

In an interview with The New York Times, Dr. Robert Malone, one of the panelists, claimed that the Food and Drug Administration was “hiding” data on the risks of Covid vaccination and had refused to share it despite multiple requests.

“I am trying to force F.D.A. to come clean on that,” he said.

For years, Dr. Malone has contended that the Covid vaccines may be contaminated with fragments of DNA that cause dangerous inflammatory reactions. In January 2024, Dr. Joseph Ladapo, Florida’s surgeon general, cited similar concerns when he called for a halt to the use of the vaccines.

But the F.D.A. addressed these misconceptions in a letter to Dr. Ladapo in 2023, calling the notion of DNA contamination “quite implausible” and “misleading.”