Richard Munoz v. HHS - Tdap, polymyalgia rheumatica (2024)
Case summary [AI summaries can sometimes make mistakes]
On May 18, 2021, Richard Munoz filed a petition seeking compensation under the National Vaccine Injury Compensation Program, alleging that he developed polymyalgia rheumatica (PMR) after receiving a Tdap vaccine on July 2, 2019. Mr.
Munoz was 65 years old at the time of vaccination. Prior to vaccination, he had received treatment for hip pain, experienced arm paresthesias and syncope, and had an x-ray showing cervical spondylosis with radiculopathy.
He also had knee pain attributed to osteoarthritis. Approximately three weeks after his Tdap vaccination, Mr.
Munoz reported joint pain and fatigue, which he believed began about three days post-vaccination. Initial medical evaluations were unrevealing, but he was diagnosed with synovitis, arthralgia, morning joint stiffness, myalgia, and fatigue.
By August 2019, he reported hand swelling, fatigue, aches, and joint pain, with lab work showing elevated inflammation markers. By September 2019, treaters suspected PMR, and a rheumatologist confirmed the possibility.
A neurologist considered vaccine-induced brachial neuritis, and Mr. Munoz underwent physical therapy.
Electromyographic testing in October 2019 did not confirm polyneuropathy or other nerve issues. PMR remained the prevailing diagnosis.
The case proceeded as an off-Table claim, as PMR is not listed on the Vaccine Injury Table. Petitioner's expert, rheumatologist Dr.
Petros Efthimiou, testified that PMR could be caused by the Tdap vaccine through complex immune responses, potentially involving autoimmune and autoinflammatory processes, genetic susceptibility (specifically HLA subtypes), and immune system senescence due to aging. He cited studies, including the Falsetti study, which suggested a temporal association between vaccination and PMR, and a case report referenced in the Soriano article involving a tetanus vaccine and PMR relapse.
Respondent presented expert testimony from rheumatologist Dr. Roland Staud and immunologist Dr.
William Hawse. Dr.
Staud stated that PMR's causes remain unknown, with only speculative associations to infections or environmental agents not congruent with Tdap components, and denied any vaccine could cause PMR. Dr.
Hawse disputed Dr. Efthimiou's proposed immunologic mechanisms, stating vaccines are designed for specific antigens and do not initiate autoimmune disease tolerance.
He also rejected the senescence theory, noting aging typically leads to weaker immune responses to vaccines, not aberrant ones. On August 12, 2024, Chief Special Master Brian H.
Corcoran denied entitlement, finding that Mr. Munoz failed to establish a credible medical theory causally connecting the Tdap vaccine to his PMR by a preponderance of the evidence.
The Chief Special Master found Dr. Efthimiou's arguments repetitive of those previously rejected and lacking specific evidence of a PMR-Tdap link, genetic susceptibility, or a well-substantiated senescence theory.
He found Respondent's experts effectively rebutted Petitioner's contentions. Mr.
Munoz sought review of this decision, arguing the Chief Special Master applied an impermissibly high evidentiary standard. On December 20, 2024, Judge Carolyn N.
Lerner issued an opinion affirming the Chief Special Master's decision, finding that the Chief Special Master correctly applied the preponderance of the evidence standard and did not err in weighing the evidence or assessing the persuasiveness of the expert testimony. The court found no legal error and denied the motion for review.
No compensation was awarded.
Theory of causation
Richard Munoz, a 65-year-old male, received a Tdap vaccine on July 2, 2019, and subsequently developed polymyalgia rheumatica (PMR). The claim was an off-Table, causation-in-fact claim. Petitioner's expert, Dr. Petros Efthimiou (rheumatologist), proposed that the Tdap vaccine could cause PMR through a complex immune response involving innate and adaptive immunity, potentially triggered by vaccine antigens, leading to a break in immune tolerance. His theory incorporated genetic susceptibility (HLA subtypes) and immune system senescence as contributing factors, suggesting that aging increases the likelihood of autoimmune disease following vaccination. Dr. Efthimiou cited case reports and studies (Falsetti, Soriano) suggesting a temporal association between vaccination and PMR. Respondent's experts, Dr. Roland Staud (rheumatologist) and Dr. William Hawse (immunologist), disputed this theory. Dr. Staud stated PMR causes are unknown and not linked to Tdap components, and Dr. Hawse argued vaccines do not initiate autoimmune disease and that senescence leads to weaker, not aberrant, immune responses. Chief Special Master Brian H. Corcoran denied entitlement, finding Petitioner failed to establish a credible medical theory by a preponderance of the evidence, citing a lack of specific evidence linking Tdap to PMR, insufficient support for genetic susceptibility and senescence theories, and speculative assumptions. Judge Carolyn N. Lerner affirmed, holding the Chief Special Master correctly applied the preponderance standard and did not err in weighing the evidence or assessing persuasiveness. No award was made.