Trump’s Threats Spark Drop in Pharmaceutical Stocks: Pfizer, Moderna, and Novavax See Significant Declines

Web Editor

September 14, 2025

a person in a white coat is holding a syil and a needle in their hand and a needle in the other hand

Background on Key Players and Relevance

The recent news of potential lawsuits by U.S. President Donald Trump against pharmaceutical companies, including Pfizer and Moderna, has caused a ripple effect in the stock market. These companies are crucial players in the global vaccine landscape, particularly for their COVID-19 vaccines. Pfizer, in collaboration with BioNTech, and Moderna have been instrumental in developing and distributing effective mRNA vaccines. Novavax, another significant player, is in the final stages of clinical trials for its COVID-19 vaccine candidate.

Trump’s Health Officials’ Claims and Stock Reactions

According to unnamed sources cited by the Washington Post, Trump’s health officials are planning to link COVID-19 vaccines to the deaths of 25 children while considering restricting access to these injections. This information stems from the Federal Vaccine Adverse Event Reporting System (VAERS), which contains unverified reports of adverse effects or negative experiences with vaccines.

As a result, Moderna’s stock dropped by 7.4%, Pfizer’s fell 3.98%, BioNTech’s U.S.-traded shares declined by 7.26%, and Novavax closed with a decrease of 3.62%. These declines reflect investor concerns about potential legal actions and regulatory changes.

Official Statements from Vaccine Manufacturers

Moderna stated that regulators in over 90 countries have not identified any new or unreported concerns regarding their COVID-19 vaccine in children or pregnant women. Pfizer, in a statement, mentioned that their vaccine—developed with BioNTech—has been administered to over a billion people, including adults, adolescents, and children, with a favorable safety profile.

Novavax informed Reuters that their clinical data and real-world evidence for the COVID-19 vaccine are available to the FDA, CDC, and numerous global regulatory bodies along with scientific and medical health experts.

Role of U.S. Health Secretary Robert F. Kennedy Jr.

Robert F. Kennedy Jr., the U.S. Health Secretary and a long-time vaccine critic, has significantly reduced the COVID-19 vaccination recommendations. The agency has removed routine vaccination guidelines for children, adolescents, and healthy pregnant women. While authorizing the vaccines for those over 65, eligibility for younger populations is limited to individuals with underlying medical conditions.

Key Questions and Answers

  • What are the potential legal actions against pharmaceutical companies? Trump’s health officials are reportedly considering lawsuits against companies like Pfizer and Moderna, alleging links between COVID-19 vaccines and child deaths.
  • How did the stock market react to these threats? Moderna’s stock fell 7.4%, Pfizer’s dropped 3.98%, BioNTech’s U.S.-traded shares declined by 7.26%, and Novavax closed with a decrease of 3.62%.
  • What do the vaccine manufacturers say about safety concerns? Moderna reported that regulators in over 90 countries found no new or unreported concerns regarding their COVID-19 vaccine in children or pregnant women. Pfizer stated that their vaccine has a favorable safety profile after being administered to over a billion people.
  • What changes have been made to U.S. vaccination recommendations? The U.S. Health Secretary, Robert F. Kennedy Jr., has significantly reduced COVID-19 vaccination recommendations, removing routine guidelines for children, adolescents, and healthy pregnant women. Eligibility for younger populations is now limited to those with underlying medical conditions.