In re "Agent Orange" Products Liab. Litig.

United States District Court for the Eastern District of New York · 1985 · Evidence

611 F. Supp. 1223 (E.D.N.Y. 1985)

Updated August 22, 2026

EvidenceRule 702Rule 703Rule 403Rule 803(8)(C)Rule 56expert testimonyepidemiology

Facts

The opt-out plaintiffs claimed that exposure to Agent Orange in Vietnam caused a wide range of illnesses. Defendants relied on government and other epidemiological studies which, according to the court, were negative or inconclusive and did not show a causal connection between Agent Orange exposure and the claimed diseases. Plaintiffs responded primarily with affidavits from Dr. Barry Singer and Dr. Samuel Epstein, who based their opinions largely on plaintiffs' self-reported affidavits, checklists, and general literature, not on examinations of the plaintiffs or adequate verified medical proof. The court found that no treating or examining physician affidavits, medical records for nearly all plaintiffs, or reliable plaintiff-specific exposure evidence had been submitted.

Issue

Whether plaintiffs' expert affidavits and supporting materials were admissible and sufficient to create a genuine issue of material fact on causation in these opt-out Agent Orange cases. If not, whether defendants were entitled to summary judgment dismissing the claims.

Rule

In a toxic tort case, expert causation testimony offered to defeat summary judgment must satisfy Rules 702, 703, and 403. Even if an expert is qualified and uses a generally acceptable inferential methodology, the opinion is inadmissible if it rests on data not reasonably relied upon by experts in the field, lacks a sufficient reliable factual basis, ignores the most relevant epidemiological studies and alternative causes, or has such low probative value and misleading potential that Rule 403 requires exclusion. Once defendants present reliable epidemiological studies negating causation, plaintiffs must produce specific, competent, nonconclusory evidence showing a genuine issue of material fact; conclusory expert affidavits will not suffice.

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One of 10 multiple-choice questions for this case. Pick an answer to see why.

Residents of Toledo, Ohio sued a manufacturer claiming that airborne emissions from a nearby resin plant caused a range of illnesses. To oppose summary judgment, they offer an affidavit from Dr. Nina Patel, a qualified internist, who did not examine any plaintiff but concluded causation after reviewing attorney-prepared questionnaires in which claimants checked boxes for symptoms and stated they had no other likely exposures.

How should the court most likely rule on Dr. Patel’s affidavit?

Explanation. Under the majority opinion, expert testimony may rely on hearsay only if it is of a type reasonably relied on by experts in the field. Self-serving litigation checklists and attorney-prepared affidavits are not such materials for medical causation. Where the opinion rests mainly on those materials and not on examination, records, or other reliable plaintiff-specific proof, it is inadmissible under Rule 703 and insufficient to defeat summary judgment.