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Moderna Won’t Run Phase III Vaccine Trials as Skepticism Grows in US: Bloomberg

Key Takeaway: Moderna is reducing its investment in vaccine development due to increasing skepticism in the U.S. market, as stated by CEO Stéphane Bancel. The company will no longer fund late-stage vaccine studies, focusing instead on oncology and rare diseases. This shift comes amid regulatory challenges and diminishing support for vaccines, particularly after recent policy changes under HHS leadership.

Market Sentiment Analysis

POSITIVE FACTORS

  • Moderna's focus on oncology/rare diseases may yield high ROI.
  • Deprioritizing infectious disease programs could reduce costs.
  • CEO Bancel's strategic shift may provide clearer financial visibility.

CONCERNS & RISKS

  • Growing skepticism in the U.S. market is impacting vaccine investments.
  • Regulatory roadblocks and reduced support from health authorities hinder progress.
  • Recent policy changes have made immunization less accessible.

Full Press Release Details

Moderna is scaling down its investments in vaccine development as the U.S. market grows increasingly hostile to immunizations, CEO Stéphane Bancel toldBloomberg Newsat the World Economic Forum in Davos, Switzerland.
“You cannot make a return on investment if you don’t have access to the U.S. market,” Bancel toldBloomberg,noting that high-level headwinds have made the vaccine market “much smaller.” In particular, the CEO pointed to regulatory roadblocks and diminishing support from health authorities as key problems for Moderna and the vaccine space more broadly.
Moving forward, Bancel toldBloombergthat Moderna will no longer put money into late-stage vaccine studies, though it remains unclear if the CEO was speaking of all vaccines or just those for infectious diseases.
In a note to investors on Thursday, analysts at Jefferies said Bancel “seems inclined to develop [Moderna’s] Phase III vaccines in oncology/rare diseases,” particularly in high-risk patient populations, while “potentially deprioritizing its pre-Phase III vaccines for infectious diseases.” There are at least 11 of these infectious disease programs that could be put on the back-burner, the analysts noted.
Vaccines, Jefferies added, “still have one of the highest ROIs.”
Overall, deprioritizing its infectious disease programs “could help [Moderna] trim costs at a faster clip, providing great visibility to 2028 cash breakeven guide,” Jefferies said.
Since Robert F. Kennedy, Jr. took leadership of the Department of Health and Human Services in February 2025, he has enacted a stream of policies that have made immunization less accessible to Americans and curtailed the industry’s ability to develop new vaccines.
In May last year, for instance, Kennedyofficially removedCOVID-19 from routine immunization guidelines for healthy children and healthy pregnant women. Then, last August, hescrapped 22 mRNA vaccine research projects, including contracts with major developers such as Pfizer, Sanofi, AstraZeneca and Moderna.
Kennedy has additionally put in position officials who have also thrown up vaccine roadblocks. One key lieutenant, for instance, is CBER Director Vinay Prasad, who last monthpenned an internal FDA memoclaiming that at least 10 children had died “because of” COVID-19 vaccines. Prasad has yet to provide evidence for this claim, and an internal safety review from the FDA stated that the figure is likelyoverblown.
At the CDC, Kennedy in Juneunilaterally emptiedthe Advisory Committee on Immunization Practices, before reforming it over the next couple of months withknown vaccine critics.
Bancel joins Pfizer CEO Albert Bourla in criticizing Kennedy and his “anti-science” policies. Also at Davos, Bourla earlier this week referred to HHS’ vaccine policies as “almost like a religion.”
Moderna, which has weatheredsuccessive quarters of declining earnings, has been heavily affected by these policy headwinds. In May, the companywithdrewthe approval application for its combination vaccine for flu and COVID-19. Weeks later, Modernalosta government bird flu contract potentially worth more than $760 million after HHS terminated the project.
In the months that followed, Moderna implemented a number of measures to slow its cash burn. These include a10% workforce reductionin July and thediscontinuation of three mRNA vaccinesin November.

Frequently Asked Questions

Why is Moderna scaling back vaccine trials?

Moderna is reducing vaccine trials due to increasing skepticism in the U.S. market and regulatory challenges.

What focus will Moderna shift to?

Moderna plans to focus on oncology and rare diseases instead of infectious disease vaccines.

What recent policy changes affected Moderna?

Recent policies under HHS leadership have made immunization less accessible and hindered vaccine development.

How has Moderna's financial situation changed?

Moderna has faced declining earnings and has implemented measures to reduce costs, including workforce cuts.

Last updated: Jan 23, 2026