An analysis of Israeli Clalit Health Services’ adverse event reports reveals that one in 939 covid vaccinated adolescents, 12 to 16-year-olds, suffered a serious cardiovascular event within a few weeks during mid- 2021.
The Israeli Head of Public Health Services has publicly described the analysis findings as “garbage.”
“Either the reports reflected real clinical events, meaning a disproportionately large and temporally concentrated safety signal was present in the national system while the vaccination campaign for children was being expanded.
“Or, if the Ministry is correct and the file is indeed ‘garbage’, then the monitoring system itself was not functioning as publicly presented,” three of the study’s authors – Yaffa Shir-Raz, Yaakov Ophir and David Shuldman – write.
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271 Teenage Cardiac Reports Buried in a File Labelled “Garbage”
By Yaffa Shir-Raz, Yaakov Ophir and David Shuldman, as published by Brownstone Institute on 5 March 2026
Two hundred and seventy-one. That is the number of serious cardiovascular events reported among adolescents in Israel’s national surveillance system in just a few weeks during mid-2021.
This is the core finding of our study, published this week in the International Journal of Cardiovascular Research & Innovation. Our analysis examined a dataset of 294,877 adverse event reports submitted by healthcare professionals within Clalit Health Services, Israel’s largest health organisation, during the covid-19 vaccination campaign. These reports were formally transferred to the Ministry of Health. In May 2024, the Israeli State Comptroller revealed that approximately 279,300 of those reports had not been processed by the Ministry. The dataset we analysed consists of those very reports.
When we examined the file, the clustering was immediately visible. The structured fields alone revealed hundreds of cardiovascular cases. After applying deliberately conservative deduplication rules and excluding potential duplicate entries, 271 unique reports of cardiovascular events remained among adolescents aged 12 to 16. Nearly all occurred within a narrow window of just a few weeks, coinciding with the expansion of vaccine eligibility to this age group. Even under restrictive assumptions, this amounts to a minimum observed rate of approximately one cardiovascular event per 939 vaccinated adolescents.
In response to the Comptroller’s findings, the Ministry dismissed the dataset as flawed, citing missing fields and duplicate entries. The Head of Public Health Services publicly described the report as “garbage.” Yet the structure of the data allows straightforward filtering and analysis. Even with its limitations, the clustering is evident and requires immediate examination.
This leaves only two possible conclusions. Either the reports reflected real clinical events, meaning a disproportionately large and temporally concentrated safety signal was present in the national system while the vaccination campaign for children was being expanded. Or, if the Ministry is correct and the file is indeed “garbage,” then the monitoring system itself was not functioning as publicly presented. If so, authorities were flying blind, promoting a product as “safe” while the very mechanism meant to monitor that safety was fundamentally broken.
Hidden in Plain Sight
The full picture that emerges from the file is presented below.
To ensure our findings rested on the most solid ground, we applied a deliberately conservative analytical strategy. We counted only unique reports in which key variables – sex, birth year or dose number – were distinct. If there was any doubt about duplication or reliability, we excluded the report.
Despite this conservative approach, we identified 277 unique cardiovascular cases among minors, including acute cardiovascular injury, myocarditis and pericarditis. The timing is impossible to ignore: 271 of these cases (98%) occurred among adolescents aged 12-16 within a narrow window of just a few weeks, temporally coinciding with the expansion of vaccine eligibility to this age group.
This pattern stands in direct contradiction to the risk profile presented to the public at the time. Official health authorities repeatedly described cardiac risks as “rare,” “mild” and largely confined to young males following the second dose. The distribution observed in the dataset shows something different: cases were recorded across both sexes, across doses and within a concentrated calendar window that coincided with the adolescent rollout.
The sheer scale of these reports is even more alarming when you look at the numbers. Approximately 254,000 Clalit-insured adolescents received at least one dose during that period. To derive a minimum risk estimate, we again leaned on the most restrictive assumptions possible, treating the 271 cases as the absolute total and ignoring potential underreporting. Even under these extreme constraints, the minimum observed rate was approximately one cardiovascular event per 939 vaccinated adolescents.
Passive surveillance systems are known to capture only a fraction of adverse events. Yet even without extrapolation, the rate observed in this dataset sits uneasily alongside what was publicly characterised as “rare.” Healthcare provider-submitted reports were present in the national surveillance system in real time, as eligibility expanded and public messaging emphasised that cardiac risks in adolescents were minimal.
How a Safety Signal Was Reframed as “Garbage”
When the State Comptroller’s report was published in May 2024, it revealed that approximately 96% of the adverse event reports transferred by Clalit between December 2020 and May 2022 had not been absorbed into the Ministry of Health’s monitoring systems.
Instead of prompting a substantive safety review, the findings triggered a dispute over data transfer. The Ministry maintained that only 4% of the reports were usable, citing missing fields and duplicate entries. Clalit fired back, insisting everything had been sent “by the book.” In the crossfire, the debate centred on formatting and technical integration, while the substantive question remained unaddressed: what did the reports contain?
While the Ministry’s formal response to the Comptroller focused on these missing fields and technical gaps, Dr. Sharon Alroy-Preis, then the Head of Public Health Services, was much more blunt during a 2024 Knesset oversight hearing. She dismissed the reports, ignoring the fact that they were submitted by doctors and nurses, and even labelled them “garbage.” Moreover, she even claimed that “tens and thousands” of those reports were “false reports.”
But as our study demonstrates, the file was far from unreadable. It was filled with standardised codes and clear data from healthcare providers. The safety signal did not depend on the missing fields – it was visible within the structured data itself. By branding the data as “garbage,” officials shifted the institutional focus from examining the signal to disputing the medium through which it was transmitted.
How the Alarming Reports Were Buried
The Ministry of Health’s awareness of the cardiovascular risk dates back to the very beginning. On 28 February 2021, months before the adolescent rollout, the Ministry alerted the CDC to a “large number” of myocarditis cases in young people. This alert, later disclosed through a US Freedom of Information request, demonstrates that the emerging cardiovascular risk was recognised at a very early stage.
Yet, as the State Comptroller’s 2024 report revealed, the Ministry was also aware of significant reporting gaps at a very early stage, at least as early as February 2021. This leads to a central question: Why, despite knowing both the risk and the technical glitches, did the Ministry fail to analyse the actual content of nearly 300,000 reports to determine whether a safety signal was present?
Perhaps an even more fundamental question follows. Is it plausible that neither the health fund nor the Ministry conducted even a preliminary examination of the file, despite missing fields? Given the simplicity of the reporting structure, where identifying clustering requires little more than basic filtering, it is difficult to assume that no such elementary step was ever taken. Was the file truly never examined, or was it examined and its implications left unaddressed?
Rather than triggering a substantive examination of the reports themselves, the issue increasingly became framed as a technical and procedural dispute. The Ministry, Clalit and even the State Comptroller focused largely on questions of data transfer, missing fields and system integration. This institutional focus created an appearance of oversight, while the clinical content of the reports remained largely unexamined. The debate over format and functionality shifted attention away from what the dataset might reveal.
By the time the rollout for 12-15-year-olds began, the national surveillance file was already showing a concentrated cardiovascular pattern that mirrored the Ministry’s own earlier warning. By framing the issue primarily as a “technical malfunction,” the discussion moved away from the medical content of the reports themselves. The technical debate between the Ministry and Clalit functioned as a distraction, allowing an appearance of scrutiny while the alarming reports submitted by medical staff were effectively buried and the public was reassured into complacency.
As Professor Retsef Levi, an expert in risk management and health analytics at MIT, explains: “Transparency on the benefits, risks and related uncertainty is key to build trust in vaccine programmes and is ethically required as part of informed consent. Unfortunately, during the covid vaccination campaigns we have seen examples when these principles were not followed. I think that especially for populations with low risk for severe outcomes, health agencies should be very timely and proactive in analysing potential safety risks and inform parents and patients about what is known and what is unknown.“
At the very same time, official public messaging projected confidence in continuous oversight. In a September 2021 communication, the Ministry of Health informed the public that adverse events were being routinely reviewed and examined by professional committees. Public statements during this period similarly emphasised that reported post-vaccination symptoms were generally temporary and not a cause for concern, reinforcing public confidence that safety oversight was functioning as intended.
The Israeli case was not unique. Internal CDC and FDA correspondence shows a similar dynamic following Israel’s early alert. In an internal response document (“Myocarditis Response.docx”), US officials reframed the warning as follows: “The Ministry of Health stated they received reports of around 40 cases of this adverse event. They did not provide additional details about these cases” (CDC, 2023, p. 714). FOIA disclosures further reveal that US officials reassured themselves by citing just 27 VAERS reports identified by late February 2021. Rather than prompting escalation, attention shifted toward the absence of technical detail, allowing uncertainty about reporting completeness to temper the perceived urgency of the signal itself.
This broader context matters because Israel was widely described at the time as the world’s “vaccine laboratory,” a characterisation publicly echoed by Pfizer CEO Albert Bourla, who emphasised the country’s centralised health data as uniquely suited for real-time monitoring. As global health authorities looked to Israel for early safety insights, the consequences of an unexamined signal extended beyond national borders. Whether the reports were never analysed or were analysed without triggering regulatory action, the failure reverberated internationally.
Ultimately, the Ministry’s attempt to dismiss these records as “garbage” collapses under its own logic. If the reports are accurate, they point to a serious safety signal that was ignored. But if the Ministry is correct and the data is indeed “defective,” two disturbing questions remain: First, how did hundreds of unique cardiovascular reports among adolescents appear “out of thin air” within a monitoring system restricted solely to medical professionals, and second, why did the Ministry fail to correct the system in real time while aggressively encouraging parents to vaccinate children who were at no significant risk from the disease?
As the State Comptroller himself noted, while many reports received from medical institutions described minor symptoms, others involved “more significant symptoms that required investigation … [yet] were not investigated close to the actual reporting date.” In practice, the report adds, “the Ministry investigated about 1,000 side effects, about a quarter of which (275 cases) were myocarditis and pericarditis.” This finding reinforces the central concern raised by our analysis: that critical safety information submitted by healthcare professionals may not have been evaluated when it mattered most.
Moreover, if missing information was the only barrier to analysis, why has the Ministry not retrieved and examined it by now? The missing data still exists within Clalit’s systems. One year after the Comptroller’s report, co-author David Shuldman formally inquired whether the Ministry had completed such a review. The Ministry responded that it held no additional information and referred the inquiry back to Clalit.
In his recommendations, the State Comptroller called on the Ministry of Health to “enter the missing data into its systems, analyse the complete data, and cooperate with the HMOs” so that the hundreds of thousands of reports collected by medical institutions could be fully utilised. The recommendation itself assumes that the information required for analysis remained available.
These are not just procedural questions. They concern the core function of regulatory oversight. The Ministry authorised the vaccine, expanded its use to children and assured the public that safety was being monitored, even as it acknowledged significant failures in the monitoring system. If the transferred file was incomplete, that did not remove the Ministry’s obligation to complete the review.
Our analysis reveals an unusual and temporally concentrated cardiovascular signal among adolescents. Nearly five years later, the underlying reports remain unexplained. Until these findings are fully examined, serious concern remains that the vaccination campaign may have exposed children to risks that were not adequately evaluated at the time.
About the Authors
Yaffa Shir-Raz, PhD, is a risk communication researcher and a teaching fellow at the University of Haifa and Reichman University. Her area of research focuses on health and risk communication, including Emerging Infectious Disease communication, such as the H1N1 (bird flu) and the covid-19 outbreaks. She examines the practices used by the pharmaceutical industries and by health authorities and organisations to promote health issues and brand medical treatments, as well as censorship practices used by corporations and by health organisations to suppress dissenting voices in the scientific discourse. She is also a health journalist, editor of the Israeli Real-Time Magazine and a member of the Public Entity for the Control of Corruption (“PECC”) general assembly.
Dr. Yaakov Ophir is Head of the Mental Health Innovation and Ethics Lab at Ariel University and a member of the Steering Committee for the Centre for Human-Inspired Artificial Intelligence (“CHIA”) at the University of Cambridge. His research explores digital-age psychopathology, AI and VR screening and interventions, and critical psychiatry. His recent book, ‘ADHD Is Not an Illness and Ritalin Is Not a Cure’, challenges the dominant biomedical paradigm in psychiatry.
David Shuldman is a member of the Givat Mordechai Community Association, a non-governmental organisation in Jerusalem, Israel.
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