In the United States Court of Federal Claims
OFFICE OF SPECIAL MASTERS
No. 19-969V
UNPUBLISHED
COLLEEN BLOCK, Chief Special Master Corcoran
Petitioner, Filed: October 29, 2021
v.
Special Processing Unit (SPU); Off-
SECRETARY OF HEALTH AND Table Dismissal; Influenza (Flu);
HUMAN SERVICES, Guillain-Barré syndrome (GBS);
Althen Prong Three; One-Day Onset;
Respondent. Adaptive Immune Response.
Lia Obata Dowd, Dowd & Dowd, P.C., St. Louis, MO, for Petitioner.
Jeremy Fugate, U.S. Department of Justice, Washington, DC, for Respondent.
ENTITLEMENT DECISION1
On July 3, 2019, Colleen Block filed a petition for compensation under the National
Vaccine Injury Compensation Program, 42 U.S.C. §300aa-10, et seq.2 (the “Vaccine
Act”). Petitioner alleged that she suffered Guillain-Barré syndrome (“GBS”) as a result of
an influenza (“flu”) vaccine administered on November 10, 2017. Petition at 1-2. The case
was assigned to the Special Processing Unit of the Office of Special Masters (the “SPU”).
On April 26, 2021, after consideration of the medical record and other filed
evidence, I concluded that Petitioner had experienced the onset of her alleged GBS
1
Because this unpublished opinion contains a reasoned explanation for the action in this case, I am
required to post it on the United States Court of Federal Claims' website in accordance with the E-
Government Act of 2002. 44 U.S.C. § 3501 note (2012) (Federal Management and Promotion of Electronic
Government Services). This means the opinion will be available to anyone with access to the internet.
In accordance with Vaccine Rule 18(b), Petitioner has 14 days to identify and move to redact medical or
other information, the disclosure of which would constitute an unwarranted invasion of privacy. If, upon
review, I agree that the identified material fits within this definition, I will redact such material from public
access.
2
National Childhood Vaccine Injury Act of 1986, Pub. L. No. 99-660, 100 Stat. 3755. Hereinafter, for ease
of citation, all section references to the Vaccine Act will be to the pertinent subparagraph of 42 U.S.C. §
300aa (2012).
symptoms within approximately 24 hours of vaccination – outside of the 3 to 42-day period
prescribed for a Table flu/GBS injury – thus, constituting grounds for dismissal of that
claim. See generally Findings of Fact and Conclusions of Law (ECF No. 25) (“Table Claim
Dismissal”). In so doing, I also observed that Petitioner’s submission of an expert report
from a neurologist, Dr. David Simpson, barely supported even a causation-in-fact version
of the claim. But I noted that I would permit both sides to submit additional evidence on
the medical acceptability of onset for a non-Table version of the claim. Table Claim
Dismissal at 11-13.3
Both parties have offered legal responses4 and expert materials5 on this issue.
Having reviewed these materials in light of my prior opinion, I hereby conclude that
Petitioner has not established by a preponderance of the evidence that the onset of GBS
within 24 hours of receipt of the flu vaccine is medically acceptable. Therefore, she cannot
establish causation-in-fact and her non-Table claim is hereby dismissed.6
I. Evidentiary and Expert Submissions
A. Respondent’s Experts
On June 10, 2021, Respondent filed reports from two experts. The first, Norman
Werdiger, M.D., has been employed at the Yale University School of Medicine since 1982
and specifically as a clinical associate professor of neurology since 2006. See Werdiger
3
My prior summary of the relevant procedural history, underlying facts, Petitioner’s expert’s first report,
parties’ arguments, applicable legal standards, and my initial analysis concerning the feasibility of
Petitioner’s off-Table flu/GBS claim are set forth at length in the Table Claim Dismissal, and fully
incorporated and relied upon herein.
4
Petitioner’s Brief filed September 1, 2020 (ECF No. 20); Respondent’s Brief filed October 30, 2020 (ECF
No. 24). While the briefs were filed prior to the Table Claim Dismissal (and are cited therein), those briefs
address whether Petitioner has established an off-Table claim.
5
See Expert Report of David Simpson, M.D. dated September 1, 2020, filed as Ex. 13 (ECF No. 21)
(“Simpson Rep.”); Expert Report of Norman Werdiger, M.D., dated June 4, 2021, filed as Ex. A (ECF No.
27-1) (“Werdiger Rep.”); Expert Report of Neil Romberg, M.D., dated June 10, 2021, filed as Ex. N (ECF
No. 28-1) (“Romberg Rep.”); Supplemental Report of David Simpson, M.D., dated August 29, 2021, filed
as Ex. 26 (ECF No. 30) (“Simpson Supp. Rep.”).
6
While this opinion discusses the elements of the record that were emphasized by the parties and that I
found most relevant to the outcome, I have reviewed and considered the entire record, including all of the
literature submitted by both parties. Section 13(a)(1); see also Moriarty v. Sec’y of Health & Human
Servs., 844 F.3d 1322, 1328 (Fed. Cir. 2016) (“we generally presume that a special master considered
the relevant record evidence even though he does not explicitly reference such evidence in his decision”);
Simanski v. Sec’y of Health & Human Servs., 115 Fed. Cl. 407, 436 (2014) (“a special master is not
required to discuss every piece of evidence in [his] decision”) (internal citation omitted), aff’d, 601 Fed.
Appx. 982 (Fed. Cir. 2015).
2
Rep. at 2. Dr. Werdiger retired his private neurology practice in August 2019 but continues
to provide outpatient general neurological care through his affiliation at Yale. Id. In the
past five years, he has seen or participated in the treatment of approximately ten patients
with GBS. Id. He has not authored any publications that inform this case but based his
opinion on a review of the relevant literature.
Respondent’s second expert, Neil Romberg, M.D., joined Yale University as a
fellow in allergy and clinical immunology from 2008 to 2011, then served as an associate
professor and the director of Yale’s Pediatric Immune Deficiency Clinic from 2011 to 2015.
See Romberg Rep. at 1. Since 2015, he has served as an assistant professor of pediatrics
at the University of Pennsylvania School of Medicine and an attending physician at the
Children’s Hospital of Philadelphia. Id. at 1-2. Dr. Romberg has focused his career on
researching the molecular mechanisms, as well as providing appropriate treatment, for
immunological disorders. Id. He asserted that he is aware of the classic findings as well
as the immunological basis of GBS. Id. at 1, 5.
Respondent’s experts both take issue with an item of literature that was offered in
connection with the submission of Petitioner’s earlier expert report (and discussed at
length in the Table Claim Dismissal), Park. See Table Claim Dismissal at 7-8, 11-12. Drs.
Werdiger and Romberg both note that although Park describes the South Korean
government’s compensation of claims for post-vaccination GBS, including instances in
which the illness purportedly manifested within two days, approximately one-third of the
total cases were not confirmed diagnostically. Additionally, approximately one-tenth of the
cases at issue may have been caused by unrelated infections. Werdiger Rep. at 14;
Romberg Rep. at 8. Otherwise, these experts argue, the South Korean government’s
decision to compensate certain cases of purported GBS manifesting less than two days
of vaccination does not establish anything with regard to causation. Werdiger Rep. at 14;
Romberg Rep. at 8.
Respondent’s experts further discussed the pathophysiology of GBS and how that
relates to its clinical onset after a triggering event. As they explained, GBS occurs when
a genetically susceptible individual encounters an environmental agent which causes an
adaptive immune response, including T cells and antibodies, misdirected against specific
targets in the peripheral nervous system. The misdirection occurs due to molecular
mimicry between amino acid sequences on the proteins of the pathologic/presenting
antigens and the similar sequences in the protein components of nerve structures.
Romberg Rep. at 6; Werdiger Rep. at 12 (citing K. Sheikh, Review: Guillain-Barré
Syndrome, 26 Continuum – Peripheral Nerve and Motor Neuron Disorders 1184 (2020),
filed as Exhibit D (ECF No. 27-4) (“Sheikh”)).
3
Dr. Romberg opined that the time it would take for this process to result in the
onset of GBS could not occur within one day of exposure to the precipitating
environmental agent. Rather, the adaptive immune response is “more deliberate,” and
will involve “a delay between exposure and onset of symptoms,” in contrast to the more
rapid, but nonspecific, innate immune response. Romberg Rep. at 8, citing C.A. Janeway
et al., Principles of Innate and Adaptive Immunity, in Immunobiology: The Immune
System in Health and Disease (5th ed. 2001), filed as Exhibit X (ECF No. 28-11).
Dr. Romberg acknowledged that certain epidemiologic evidence seemed facially
to allow for the possibility of a short onset, but he opined that this evidence was ultimately
thin and quite limited. One such article, long cited in favor of the flu vaccine-GBS
association, reported that a small number of GBS cases observed – 10 out of 532, or
1.8% - manif within two days of vaccination. Romberg Rep. at 7-8, citing L. Schonberger
et al., Guillain-Barré Syndrome Following Vaccination in the National Influenza
Immunization Program, United States, 1976 – 1977, 100 Am. J. Epidem. 105 (1979), filed
as Ex. 19 (ECF No. 21-6) (“Schonberger”). A later meta-analysis of 23 million adverse
events reported after flu vaccines, found only 54 instances of GBS - with 51 of them (95%)
showing onset within two days. Romberg Rep. at 9, citing D.A. Salmon et al., Association
Between Guillain- Barré Syndrome and Influenza A (H1N1) 2009 Monovalent Inactivated
Vaccines in the USA: A Meta-Analysis, 381 Lancet 1461 (2013), filed as Ex. Y (ECF No.
28-12 (“Salmon”). Importantly, neither Schonberger nor Salmon address whether the
timing for this small minority of cases is even medically acceptable. Thus, Dr. Romberg
maintained that these findings were inconsistent with what was well understood about
GBS’s pathologic timeframe, as well as too minimal to be meaningful.
Dr. Werdiger agreed with the above, adding that the timeframe issue could be
better grasped by analogizing GBS to another neurological injury also understood to be
mediated by an adaptive immune response - acute disseminated encephalomyelitis
(“ADEM”). Werdiger Rep. at 12, citing A. Rowhani-Rahbar et al., Review: Biologically
Plausible and Evidence-Based Risk Intervals in Immunization Safety Research, 31
Vaccine 271 (2012), filed as Exhibit K (ECF No. 27-11) (“Rowhani-Rahbar”). In discussing
ADEM, Rowhani-Rahbar writes that “Some neurologic events are immune-mediated in
which an immune response involving self-directed antibodies are autoreactive T-cells
generated against neuronal epitopes may occur. Consideration of biologic plausibility of
an AEFI [adverse event following immunization] would require a certain period between
immunization and onset of symptoms.” Id. at 274 (emphasis added). While there is limited
data existing about the shortest possible timeframe between introduction of an antigen,
mounting of a subsequent immune response, and the onset of clinical disease, “an
interval of less than 48 h[ours] would seem to be biologically implausible.” Id. (emphasis
added). As a result, the Centers for Disease Control and Prevention (“CDC”), upon
4
reviewing an individual case of vaccination and ADEM, only considers a potential causal
association when onset is beyond 48 hours. Id. Indeed, more robust epidemiological
studies only consider causation potentially present when the onset exceeds five days. Id.
Dr. Werdiger opined that the same limitations on the timeframe between vaccination and
GBS should apply, because of the diseases’ similar pathophysiology.
B. Dr. Simpson’s Supplemental Report
In his supplemental report,7 Dr. Simpson discussed some of the limitations on Park
raised by Respondent. He acknowledged that over one-third of the GBS diagnoses
discussed by Park were uncertain. Simpson Supp. Rep. at 6. But he maintained that these
cases were nevertheless “reviewed thoroughly and concluded as having GBS by experts
meeting.” Id. In so arguing, however, he did not address the other concern that I raised,
and Respondent’s experts echoed – that pre-vaccination infection could not be excluded
as a causative factor in approximately one-tenth of the total compensated flu-GBS cases
considered in Park. Dr. Simpson also suggested that South Korea’s vaccine
compensation program “appears to have notable similarities to that employed by the US
National Vaccine Compensation Program.” Id. However, the only discernable similarity is
that South Korea’s program involves some degree of participation by medical experts.
Dr. Simpson went on to address issues relevant to the timeframe for an aberrant
immune response leading to GBS. He acknowledged that the “early onset of neurological
symptoms” following vaccination is “atypical,” but has nevertheless been reported by
other authors such as Schonberger and Salmon. Simpson Supp. Rep. at 5. He further
opined that there is precedent for his proposed one-day timeframe, as reflected by the
CDC’s defined risk interval of 0 – 48 hours between receipt of inactivated flu vaccine and
febrile seizures. Simpson Supp. Rep. at 6 (citing Rowhani-Rahbar at 273). However, Dr.
Simpson did not explain why febrile seizures, rather than ADEM, are a more useful
analogue for GBS. And he did not dispute that GBS involves an adaptive immune
response, in which it would take time both for the adaptive response to mount and then
for the autoimmune attack to cause symptoms.
7
Dr. Simpson devoted several pages to addressing other points raised by Respondent’s experts, including
whether GBS is the correct diagnosis for Petitioner’s injury and whether her injury was more likely caused
by a preceding diarrheal illness. Simpson Supp. Rep. at 2-5. I have reviewed both parties’ positions on
those issues, but find them unnecessary to resolve, in light of the dispositive onset issue which is discussed
above.
5
II. Legal Standard for Althen Prong Three
As previously noted, a temporal association alone between vaccination and
disease onset “does not suffice to show a causal link” between the two. Table Claim
Dismissal at 11 (quoting Grant v. Sec'y of Health & Human Servs., 956 F.2d 1144, 1148
(Fed. Cir. 1992)). Rather, under the third prong set by the Federal Circuit in Althen v.
Sec’y of Health & Human Servs., 418 F.3d 1274 (Fed. Cir. 2005), a petitioner is required
to establish a “proximate temporal relationship” between the vaccination and the injury
alleged. Althen, 418 F.3d at 1281 (emphasis added). That relationship must ultimately be
“medically acceptable.” Id.
To establish this prong, a petitioner must offer “preponderant proof that the onset
of symptoms occurred within a timeframe which, given the medical understanding of the
disorder's etiology, it is medically acceptable to infer causation.” De Bazan v. Sec’y of
Health & Human Servs., 539 F.3d 1347, 1352 (Fed. Cir. 2008). The explanation for what
is a medically acceptable timeframe must align with the theory of how the relevant vaccine
can cause an injury (Althen prong one's requirement). Id. at 1352; Shapiro v. Sec’y of
Health & Human Servs., 101 Fed. Cl. 532, 542 (2011), recons. denied after remand, 105
Fed. Cl. 353 (2012), aff'd mem., 503 F. Appx. 952 (Fed. Cir. 2013); Koehn v. Sec’y of
Health & Human Servs., No. 11-355V, 2013 WL 3214877 (Fed. Cl. Spec. Mstr. May 30,
2013, mot. for rev. denied (Fed. Cl. Dec. 3, 2013), aff'd, 773 F.3d 1329 (Fed. Cir. 2014).
III. Analysis
Over a year ago, I warned Petitioner that (even despite the fact that within the
Vaccine Program, GBS is widely understood to be associated with flu vaccine), a GBS
onset within 24 hours of receipt of flu vaccine would likely thwart even an off-Table claim.
Order to Show Cause (ECF No. 18) (citing Rowan v. Sec’y of Health & Human Servs.,
No. 17-760V, 2020 WL 2954954 (Fed. Cl. Spec. Mstr. April 28, 2020) (finding that GBS
is known to be mediated by autoantibodies produced via the adaptive immune system,
and this process, if vaccine-induced, likely takes longer than three days to result in
symptoms). Then, in dismissing Petitioner’s Table claim, I noted that her expert’s first
report and supporting literature (chiefly the Park article) “would, if unrebutted, barely
support entitlement,” but that the short timing was still an area of significant risk that would
likely prove to be dispositive. Table Claim Dismissal at 12-13. Respondent has now filed
rebuttal evidence on this point, which Petitioner has not overcome.
Petitioner’s argument continues to rely solely on one item of evidence - the Park
article – to support a one-day onset for GBS after the flu vaccine. But as Respondent’s
experts have established, Park is not entitled to great weight for the reliability of its
6
medical findings. Over one-third of the cases (18/48, or 37.5%) considered by Park met
only the “lowest level” of diagnostic certainty for GBS, because of incompatible or
insufficient testing. Park at 1158. Thus, it cannot be presumed that all cases at issue,
whatever the onset, were in fact GBS. Park does not explain why the South Korean
government decided to accept the claimed diagnosis in those cases, and Park in fact
emphasizes that “complete treatment and testing results need to be obtained” to properly
evaluate the incidence of GBS following vaccination. Id. at 1158-59. Dr. Simpson has only
added that South Korea’s program appears to include some degree of medical review,
but he has not addressed the standard for compensation8 or who makes the final
determination.9
Most importantly, Petitioner has not preponderantly established that from an
immunologic standpoint, GBS could acceptably begin in so short a timeframe. On this
subject, Dr. Simpson was not persuasive. Notwithstanding his general medical education
and expertise treating neurological disorders including GBS,10 Dr. Simpson lacks the
requisite immunological background to credibly support the short timeframe. It is
reasonable for me to give less weight to his opinion, given his reduced expertise regarding
this critical question. See Rowan, 2020 WL 2954954 at *18 ( “despite his overall
testimonial qualifications, [the petitioner’s expert] cannot point to any personal research
or direct expertise on the question of the timeframe for vaccine-induced GBS onset”).
Dr. Simpson demonstrated his lack of immunological expertise upon attempting to
analogize the onset of post-vaccine GBS to that of post-vaccine febrile seizures. Simpson
Supp. Rep. at 6 (citing Rowhani-Rahbar at 273). The two simply are not comparable, for
(as discussed in many prior decisions) the theory of vaccine-induced seizure involves an
aberrant innate immune response, generating fever and (subsequently) seizure. See
Caredio v. Sec’y of Health & Human Servs., No., 2021 WL 4100294, at *30 (Fed. Cl.
Spec. Mstr. July 30, 2021) (citing Ginn v. Sec’y of Health & Human Servs., No. 16-1466V,
2021 WL 1558342 (Fed. Cl. Spec. Mstr. Mar. 26, 2021)); Tembenis v. Sec’y of Health &
8
Y. Choe and G. Bae, Review: Management of Vaccine Safety in Korea, 2 Clin. Exp. Vaccine Res. 40, 44
(2013), available at https://pubmed.ncbi.nlm.nih.gov/23596589/ (providing that South Korea provides for
compensation in cases where vaccine causation is “definite, probable, or possible,” as defined by the World
Health Organization) (emphasis added).
9
R. Mungwira et al., Research Article: Global Landscape Analysis of No-Fault Compensation Programmes
for Vaccine Injuries: A Review and Survey of Implementing Countries, 15 PLOS ONE e0233334, 7 (2020),
available at https://doi.org./10/1371/journalpone.02333334 (discussing that some countries have “purely
administrative programs” overseen by medical experts, compared to other countries, such as the United
States, in which “the final decision on compensation is made by legal experts.”).
10
See also Q.P. v. Sec’y of Health & Human Servs., No. 15-449V, 2019 WL 4013436 (Fed. Cl. Spec. Mstr.
July 29, 2019) (finding that Dr. Simpson’s limited experience in the Vaccine Program, his work as an expert
neurologist merited $500.00 per hour).
7
Human Servs., No. 03-820V, 2010 WL 5164324, at *15-16 (Fed. Cl. Spec. Mstr. Nov. 29,
2010). This can in fact occur rapidly (since the innate response begins occurring close-
in-time to a vaccine’s administration) - and thus is inapposite to GBS, which (despite its
acute and monophasic course once it becomes clinically evident) “involves the more
deliberate adaptive immune system rather than just the rapid actions of innate immune
cells.” Romberg Rep. at 8.
Respondent’s experts, by contrast, more persuasively opined that the
understanding of immunologic processes that mediate and drive GBS likely do not occur
so quickly after a triggering event. Upon introduction of the foreign pathogen (or vaccine
antigen), it takes several days for the activation of the adaptive immune response and the
production of antibodies, followed by any autoimmune attack on the peripheral nervous
system and resulting clinical manifestations. Romberg Rep. at 6; Werdiger Rep. at 12;
see also Rowan, 2020 WL 2954954, at *17 (citing Forrest v. Sec’y of Health & Human
Servs., No. 14-1016V, 2019 WL 925495, at *6 (Fed. Cl. Spec. Mstr. Jan. 28, 2019)
(explaining that these lag and “log” phases are sequential)).
As a final point, I am resolving Petitioner's claim on the papers rather than via
hearing. The Vaccine Act and Rules not only contemplate but encourage special masters
to decide petitions on the papers where (in the exercise of their discretion) they conclude
that doing so will properly and fairly resolve the case. Section 12(d)(2)(D); Vaccine Rule
8(d). The decision to rule on the record in lieu of hearing has been affirmed on appeal.
Kreizenbeck v. Sec’y of Health & Human Servs., 945 F.3d 1362, 1366 (Fed. Cir. 2020);
see also v. Hooker Sec’y of Health & Human Servs., No. 02-472V, 2016 WL 3456435, at
*21 n. 19 (Fed. Cl. Spec. Mstr. May 19, 2016) (citing numerous cases where special
masters decided case on the papers in lieu of hearing and that decision was upheld). I
am simply not required to hold a hearing in every matter, no matter the preferences of the
parties. Hovey v. Sec'y of Health & Hum. Servs., 38 Fed. Cl. 3 97, 402-03 (1997)
(determining that special master acted within his discretion in denying evidentiary
hearing); Burns, 3 F.3d at 417; Murphy v. Sec’y of Health & Human Servs., No. 90-882V,
1991 WL 71500, at *2 (Fed. Cl. Spec. Mstr. Apr. 19, 1991).
Here, Ms. Block has long been made aware that the issue of the timing in her case
was likely to be dispositive, directed to my prior rulings on this point, and given several
opportunities to provide evidence to support a different result (such as unique
circumstances, a more qualified expert, or medical literature supporting an evolving
understanding of the immune response that manifests in GBS). She has not done so.
8
Conclusion
Petitioner has not established that the onset of GBS within one day of a flu vaccine
is medically acceptable under Althen prong three. Therefore, she cannot establish
causation-in-fact, and her off-Table claim must be dismissed. In the absence of a timely-
filed motion for review (see Appendix B to the Rules of the Court), the Clerk shall enter
judgment in accordance with this decision.11
IT IS SO ORDERED.
s/Brian H. Corcoran
Brian H. Corcoran
Chief Special Master
11
Pursuant to Vaccine Rule 11(a), the parties may expedite entry of judgment by filing a joint notice
renouncing their right to seek review.
9