Nikko Cerrone v. HHS - HPV, ulcerative colitis (2023)
Case summary [AI summaries can sometimes make mistakes]
On August 28, 2017, Nikko Cerrone, a 16-year-old male, filed a petition seeking compensation under the National Vaccine Injury Compensation Program. He alleged that the human papillomavirus (HPV) vaccine (Gardasil), influenza vaccine (Flumist), and Hepatitis A vaccine he received on October 7, 2015, caused him to develop ulcerative colitis (UC).
Petitioner claimed to have experienced decreased stamina and stability in November 2015, followed by bloody stools in late December 2015. His condition progressed, leading to a formal UC diagnosis in March 2016.
Petitioner presented expert testimony from immunologist Dr. David Rosenstreich, who proposed theories of molecular mimicry and adjuvant effects to link the vaccines to UC, suggesting a timeline of approximately 80 days from vaccination to symptom onset.
Petitioner's other expert, Dr. John Santoro, a gastroenterologist, largely supported Dr.
Rosenstreich's theories and timeline assessment. Respondent, the Secretary of Health and Human Services, presented expert testimony from pediatric gastroenterologist Dr.
Chris Liacouras and immunologist Dr. Neil Romberg.
Dr. Liacouras disputed the causal link and temporal relationship, noting the lack of documented gastrointestinal symptoms until much later and that Petitioner's alleged early symptoms were nonspecific.
Dr. Romberg challenged the proposed mechanisms, stating the chance of vaccine-induced UC was near-zero and that Petitioner's theories did not meet established frameworks for molecular mimicry.
He also argued that any innate immune response to adjuvants would be immediate, not delayed. The Chief Special Master agreed with the respondent's experts, finding that Petitioner failed to establish by a preponderance of the evidence the three prongs of the Althen test for causation: a reputable medical theory, a logical sequence of cause and effect, and a proximate temporal relationship.
The Special Master noted that Petitioner's theory relied on attenuated temporal associations and uncorroborated symptoms, and that the medical records did not support the proposed immune processes. The Special Master found the respondent's experts to be more credentialed and persuasive.
Petitioner's claim for compensation was denied. On review, the United States Court of Federal Claims affirmed the Special Master's decision, finding that the Special Master applied the correct legal standards and did not abuse his discretion in concluding that Petitioner had not met his burden of proof.
The court found no legal error in the application of the preponderance of the evidence standard or in the weighing of the evidence.
Theory of causation
Petitioner Nikko Cerrone, a 16-year-old male, alleged that the HPV, influenza (Flumist), and Hepatitis A vaccines administered on October 7, 2015, caused his ulcerative colitis (UC). Petitioner's expert, Dr. David Rosenstreich, proposed theories of molecular mimicry and adjuvant effects, suggesting that vaccine antigens could mimic intestinal proteins or that adjuvants could cause an aberrant immune response, leading to UC. He estimated an 80-day timeline from vaccination to symptom onset. Respondent's experts, Dr. Chris Liacouras and Dr. Neil Romberg, disputed these theories, citing a lack of evidence for a causal link, an inadequate temporal relationship, and the unreliability of the proposed mechanisms. Dr. Romberg specifically argued that Petitioner's theories failed to meet established frameworks for molecular mimicry and that any innate immune response to adjuvants would be immediate. The Chief Special Master denied entitlement, finding Petitioner failed to establish by a preponderance of the evidence the three Althen prongs: a reputable medical theory, a logical sequence of cause and effect, and a proximate temporal relationship. The Special Master found the evidence insufficient, particularly the attenuated temporal association, uncorroborated symptoms, and lack of support for the proposed immune processes. The Court of Federal Claims affirmed, agreeing that the Special Master applied the correct legal standards and did not abuse his discretion in weighing the evidence and finding Petitioner failed to meet his burden of proof. The claim was denied.
Source PDFs
USCOURTS-cofc-1_17-vv-01158