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 organization, 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 analyzed 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.