In 2025, Pfizer faces ongoing legal fights over alleged misrepresentation, patent claims, and compensation disputes tied to its COVID vaccine.
Texas case: misrepresentation and censorship claims
In Texas, the state government sued Pfizer claiming that the company misled people about how well its COVID vaccine works and also tried to silence critics. The suit alleges that Pfizer overstated the vaccine’s benefit, presented data in ways that make it look stronger than it is, and pressured social media platforms to remove negative views.
The case was dismissed earlier because Pfizer claims legal immunity under laws meant to protect vaccine makers during public health emergencies. However, Texas has appealed, trying to bring the case back to court.
Kansas lawsuit: hiding risks and false advertising
Kansas also brought a case accusing Pfizer of false advertising and concealing risks such as heart inflammation (myocarditis) and pregnancy complications. Kansas says Pfizer did not fully warn the public of those possible side effects when promoting the vaccine. The state is pushing the case under its consumer protection laws.
A recent move in 2025 shifted this case from federal courts into Kansas state courts. That means Kansas laws will play a major role in how the case proceeds.
Patent battles: mRNA technology and licensing deals
Pfizer and its partner BioNTech are involved in many patent disputes over mRNA technology, especially the methods used in the COVID vaccine.
- A major dispute with CureVac and GSK was resolved in 2025. Under the settlement, Pfizer/BioNTech will pay about $740 million and give licenses for parts of their mRNA technology.
- Pfizer also convinced a U.S. patent tribunal to invalidate two patents held by Moderna, weakening Moderna’s claims.
- In another case, Alnylam sued Pfizer for patent infringement (related to lipid nanoparticle technology), but in 2025, a judge dismissed Alnylam’s case, deciding that Pfizer’s vaccine does not infringe Alnylam’s patents.
These outcomes give Pfizer more freedom to use its technology without as many legal restraints or large damages risk.
Immunity protections & compensation limits
One of the biggest legal challenges in all these cases comes from laws that protect vaccine makers in emergencies. Under those laws, ordinary lawsuits are blocked unless there is willful misconduct (i.e. knowing wrongdoing).
For people trying to claim injury from the vaccine, their path is limited. In the U.S., they must go through special compensation programs — not standard court lawsuits. These programs are more restrictive, with lower compensation and tougher requirements. Many claims filed have not been fully approved.
Risks and opportunities ahead
- Plaintiffs in misrepresentation cases must prove Pfizer acted knowingly and misled people, overcoming immunity claims.
- In patent cases, scientific and technical experts will fight over whether patents are valid, whether Pfizer’s work infringes them, and how broadly patents apply.
- Settlement deals like the one with CureVac show companies sometimes choose to pay and settle rather than fight long legal battles.
- The legal environment may evolve: courts or legislators may change how much immunity vaccine makers have, or how compensation systems work.
