MRNA Vaccines, Once a Trump Boast, Now Face Attacks From Some in GOP

Researchers racing to develop bird flu vaccines for humans have turned to a cutting-edge technology that enabled the rapid development of lifesaving covid shots.

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There’s a catch: The mRNA technology faces growing doubts among Republicans, including people around President Donald Trump.

Legislation aimed to ban or limit mRNA vaccines was introduced this year by GOP lawmakers in at least seven states. In some cases, the measures would hit doctors who give the injections with criminal penalties, fines, and possible revocation of their licenses.

Some congressional Republicans are also pressing regulators to revoke federal approval for mRNA-based covid shots, which President Donald Trump touted as one of the signature achievements of his first term.

The opposition comes at a critical juncture because vaccines using mRNA have applications well beyond avian flu and covid. They hold the promise of lifesaving breakthroughs to treat many diseases, from melanoma to HIV to Zika, according to clinical trials. The proposed bans could block access to these advances.

MRNA is found naturally in human cells. It is a molecule that carries genetic material and, in a vaccine, trains the body’s immune system to fight viruses, cancer cells, and other conditions. An advantage of mRNA technology is that it can be developed more quickly to target specific variants and is safer than developing a vaccine made from inactivated virus.

“Right now, if we had a bird flu pandemic, we would have a shortage of the vaccine we need,” said Michael Osterholm, director of the University of Minnesota’s Center for Infectious Disease Research and Policy. “The one thing that could save us is mRNA vaccine. The challenge would be if mRNA is banned. This is truly dangerous policy.”

The pushback conflicts with innovations championed by Trump. He assembled tech tycoons at the White House just after his inauguration to announce Stargate, a $500 billion artificial intelligence initiative that could help transform cancer treatment by creating tumor-targeting mRNA vaccines. The fledging partnership between Oracle, SoftBank Corp., and OpenAI, co-founded by Elon Musk, envisions leveraging AI in part to improve health outcomes. Patients would undergo blood tests and AI would be used to find cancer.

Scientists would examine the DNA and RNA (RNA and mRNA serve different functions in a cell) of a specific patient’s tumor to create a vaccine to teach that person’s immune system to target and destroy cells driving cancer growth.

“Imagine early cancer detection, the development of a cancer vaccine for your particular cancer aimed at you, and have that vaccine available in 48 hours,” Oracle co-founder Larry Ellison said at the White House event.

Scores of mRNA clinical trials for cancer vaccines are underway and some have shown dramatic results, cutting the risk of death and recurrence roughly in half for certain patients. In research led by the Yale School of Medicine, for example, patients with advanced kidney cancer remained cancer-free about three years after an mRNA-based treatment in an early-phase trial.

But some politically conservative doctors, lawmakers, and researchers question the safety of mRNA vaccines, especially covid shots made with the technology. Robert F. Kennedy Jr. unsuccessfully petitioned the FDA in 2021 to rescind approval for covid shots and called them “the deadliest vaccine ever made” — a controversial statement that has been refuted.

Now that he’s newly confirmed as Health and Human Services secretary, Kennedy is poised to oversee federal approvals of vaccines, with the power to shape policy such as immunization schedules and appoint vaccine opponents to committees that advise on the approval of shots.

Bloomberg reported late last month that Trump administration health officials were reevaluating a $590 million contract for bird flu shots that the Biden administration awarded to Moderna as part of its push to examine spending on mRNA vaccines.

HHS and White House spokespeople didn’t return emails seeking comment.

Support for an mRNA ban is coming from other sources too. Florida Gov. Ron DeSantis on March 5 urged the Centers for Disease Control and Prevention to stop recommending the covid-19 vaccine for children and called for a state ban on mRNA vaccine mandates. In February, Rep. Thomas Massie (R-Ky.) said on X that the “FDA should immediately revoke approval of these shots,” and Sen. Ron Johnson (R-Wis.) is leading an investigation into the safety of the vaccines. Trump in February signed an order to strip federal funds from schools that require covid shots for attendance.

Vaccine skepticism has become pronounced among Republicans since the pandemic. Four in 10 Republicans who responded to a KFF poll published in January said it was “probably” or “definitely true” that “more people have died from covid-19 vaccines than from the virus itself.” Just a quarter of Republicans reported holding that view in 2023.

The effort is also finding traction at the local level. A district health department outside Boise, Idaho, last year banned its health department from administering covid-19 vaccines, and local lawmakers in Franklin County, Washington, passed a resolution in February against mRNA vaccines.