You just got a letter that says the chemical exposure in your case was "too low to cause the illness claimed." That argument is about the dose-response relationship: the basic scientific idea that the effect of a substance often depends on how much a person was exposed to, how often, and for how long. In plain terms, a tiny dose may do little or nothing, while a larger or repeated dose may raise the risk of harm. For some substances, there may be a threshold below which no effect is expected; for others, even low levels may matter over time.

This matters because companies and insurers use dose-response arguments to downplay exposure, especially in toxic tort and occupational disease cases. They may say there is no proof of the actual dose, or that studies do not show a strong enough link at the level involved. That can weaken causation if your medical and exposure evidence is vague, incomplete, or based only on general suspicion.

In New York, courts closely examine this issue. In Parker v. Mobil Oil Corp. (2006), the New York Court of Appeals said an expert must do more than say a toxin is dangerous in general; the opinion must connect the plaintiff's exposure to the illness in a scientifically grounded way. Later cases, including Cornell v. 360 W. 51st St. Realty, LLC (2014), reinforced that point. That means records, testing, work history, and reliable expert analysis can make or break a personal injury claim tied to chemical exposure.