⚠️ “Pfizer Admits Its COVID-19 Vaccines Cause Cancer” — What You Need to Know
Claims that Pfizer has admitted its COVID-19 vaccine causes cancer are misleading. There is an important distinction between investigating possible safety signals and establishing that a vaccine causes cancer.
The European Medicines Agency (EMA) states that available evidence does not show that COVID-19 vaccines cause cancer as a long-term side effect. It also notes that extensive safety monitoring has not identified evidence of cancer caused by mRNA COVID-19 vaccines. European Medicines Agency (EMA)
What about claims involving DNA or SV40 sequences?
There have been public claims concerning residual DNA, plasmid manufacturing material, and SV40-related sequences in Pfizer’s vaccine. These claims have generated considerable discussion, but their existence does not establish that vaccination causes cancer in humans.
A 2024 FDA advisory-committee transcript contains allegations and questions about these issues, including claims about cancer mechanisms. However, those statements were presented during a discussion and are not an FDA finding that Pfizer’s vaccine causes cancer. U.S. Food and Drug Administration
What side effects are actually recognized?
COVID-19 vaccines can cause side effects, most commonly temporary reactions such as injection-site pain, fatigue, headache, muscle aches, and fever.
Importantly, regulators have identified some rare but real serious adverse events. For example, in June 2025 the FDA required updated warnings for Pfizer’s Comirnaty and Moderna’s Spikevax concerning myocarditis and pericarditis following mRNA vaccination. U.S. Food and Drug Administration
Does Pfizer’s vaccine still have regulatory approval?
In the United States, the FDA says that the emergency-use authorization for the Pfizer-BioNTech COVID-19 vaccine was revoked on August 27, 2025, while Comirnaty remains FDA-approved for specified uses. U.S. Food and Drug Administration
🎗️ The bottom line
It is reasonable to ask questions about vaccine safety and to examine new evidence. But “Pfizer admits its COVID-19 vaccine causes cancer” is not an accurate summary of the evidence.
A responsible health post should distinguish between a reported safety concern, a hypothesis, and a scientifically established causal relationship. At present, major regulators do not conclude that Pfizer’s COVID-19 vaccine causes cancer. European Medicines Agency (EMA)+1
