Without proof of what caused the disease, there is no product liability case.
The Supreme Court’s decision in Monsanto Co. v. Durnell (2026 U.S. LEXIS 2721, 2026 LX 336645) has focused national attention on warning labels, federal regulation, and preemption. Those are important legal issues, but in product liability litigation involving slow-starting, late-onset diseases such as cancer, they arise only after the threshold issue of causation has been resolved.
Before there can be a product liability case, there must first be proof that the product caused the disease.
Every product liability lawsuit seeking recovery for personal injury or death from a slow-starting, late-onset disease such as cancer begins with a person who has developed the disease.
The first question is simple: What caused the disease?
Until that question can be answered, there is no product liability case.
Identifying the cause of a slow-starting, late-onset disease is difficult and expensive. It requires extensive scientific investigation, qualified expert witnesses, epidemiological evidence, toxicological evidence, pathological evidence, and persuasive proof that a particular product caused the plaintiff’s disease.
Once the evidence identifies a particular product as the probable cause of the plaintiff’s disease, the litigation turns to whether the product, as designed, manufactured, advertised, promoted, marketed, and sold, was unreasonably dangerous.
Modern product liability litigation has too often emphasized secondary issues about labels.
That sequence is backwards because labels, warnings, and preemption become relevant only after a particular product has been identified as the probable cause of the plaintiff’s disease. They are not the beginning of a product liability case.
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Before There Can Be a Product Liability Case, There Must Be Causation
July 7, 2026 | Litigation, Policy Analysis
Without proof of what caused the disease, there is no product liability case.
The Supreme Court’s decision in Monsanto Co. v. Durnell (2026 U.S. LEXIS 2721, 2026 LX 336645) has focused national attention on warning labels, federal regulation, and preemption. Those are important legal issues, but in product liability litigation involving slow-starting, late-onset diseases such as cancer, they arise only after the threshold issue of causation has been resolved.
Before there can be a product liability case, there must first be proof that the product caused the disease.
Every product liability lawsuit seeking recovery for personal injury or death from a slow-starting, late-onset disease such as cancer begins with a person who has developed the disease.
The first question is simple: What caused the disease?
Until that question can be answered, there is no product liability case.
Identifying the cause of a slow-starting, late-onset disease is difficult and expensive. It requires extensive scientific investigation, qualified expert witnesses, epidemiological evidence, toxicological evidence, pathological evidence, and persuasive proof that a particular product caused the plaintiff’s disease.
Once the evidence identifies a particular product as the probable cause of the plaintiff’s disease, the litigation turns to whether the product, as designed, manufactured, advertised, promoted, marketed, and sold, was unreasonably dangerous.
Modern product liability litigation has too often emphasized secondary issues about labels.
That sequence is backwards because labels, warnings, and preemption become relevant only after a particular product has been identified as the probable cause of the plaintiff’s disease. They are not the beginning of a product liability case.