Bluejay Diagnostics Announces SYMON-II Clinical Dataset Details Supporting Evaluation of Mortality Risk in Sepsis and Septic Shock

ACTON, MA / ACCESS Newswire / October 6, 2026 / Bluejay Diagnostics, Inc. (NASDAQ:BJDX) ("Bluejay" or the "Company"), a medical diagnostics company focused on improving patient outcomes through its Symphony™ near-patient diagnostic platform, today announced baseline clinical characteristics from the SYMON-II clinical validation study, highlighting a substantial and diverse population of critically ill patients and clinically meaningful mortality events for evaluating interleukin-6 ("IL-6") as a biomarker associated with 28-day mortality risk in patients with sepsis and septic shock.

The current preliminary SYMON-II analysis includes 777 evaluable patients, consisting of 637 28-day survivors and 140 28-day non-survivors, representing an overall 28-day mortality rate of approximately 18%. The study population included patients across a broad spectrum of illness severity, ethnicity and geographical distribution with 39.5% meeting Sepsis-3 criteria for septic shock.

The clinical characteristics demonstrate substantial disease burden and severity. 84.0% of patients had bacterial infection reported, 32.4% had a positive blood culture, and infection was considered highly likely or likely in 86.5% of the study population.

Patients who did not survive through 28 days demonstrated greater baseline illness severity. Septic shock was present in 56.4% of non-survivors compared with 35.8% of survivors.

"These clinical data are important because the value of a prognostic biomarker depends upon its evaluation in a sufficiently large and clinically relevant patient population with meaningful outcomes," said Dr. Mark Feinberg, Chief Medical Advisor of Bluejay Diagnostics. "The SYMON-II clinical validation study provides a substantial number of 28-day mortality events across patients with differing levels of sepsis severity, creating an important clinical foundation for evaluating the prognostic performance of IL-6."

"The company's earlier SYMON-I pilot study provided an encouraging clinical signal supporting the potential role of IL-6 in mortality risk assessment," said Dr. Feinberg. "The SYMON-II clinical validation study gives us the opportunity to evaluate that signal in a substantially larger and clinically diverse population."

Potential Importance of Rapid IL-6 Information

Sepsis is a highly heterogeneous and rapidly evolving condition. Patients presenting with severe infection may follow substantially different clinical trajectories, creating a need for timely information that can help clinicians assess patient risk.

Bluejay is developing the Symphony™ Suite as a rapid quantitative biomarker assay platform. The Company's development strategy is intended to bring quantitative biomarker information closer to the patient and make results available rapidly enough to potentially complement clinical assessment and established measures of disease severity.

The Company is continuing its analysis of clinical samples and data, including evaluation of IL-6 measurements and their relationship to 28-day mortality and other relevant clinical parameters. The baseline characteristics announced today do not themselves establish the prognostic performance, clinical utility, sensitivity, specificity or regulatory acceptability of the Symphony™ IL-6 Test. Those conclusions will depend upon completion of the planned analyses.

The Symphony™ IL-6 Test has not been cleared or approved by the U.S. Food and Drug Administration ("FDA") and is not currently available for commercial clinical use in the United States.

About the SYMON Clinical Study Program:

The SYMON Clinical Study Program includes SYMON-I (clinicaltrials.gov ID NCT06181604), SYMON-II (NCT06654895), and SYMON-III (NCT07425587). SYMON-I is a pilot study to determine IL-6 levels associated with various endpoints, including, but not limited to 28-day all-cause mortality and in-hospital mortality. The SYMON-II study is the pivotal study to validate the outcomes of the SYMON-I study, which the Company plans to use to support a 510(k) application to FDA. The SYMON-III study is a pilot study to determine IL-6 levels associated with patients presenting with increasing severity of infection in the emergency department and risk of developing sepsis.

About Bluejay Diagnostics:

Bluejay Diagnostics, Inc. is a medical diagnostics company focused on improving patient outcomes using its Symphony™ Suite, a cost-effective, rapid, near-patient testing system for sepsis triage and monitoring of disease progression. Bluejay does not yet have regulatory clearance for the Symphony™ Suite, and we will need to receive regulatory authorization from the U.S. Food and Drug Administration before Symphony™ can be marketed as a diagnostic product in the United States. Bluejay's first product candidate, an IL-6 Test for sepsis, is designed to provide accurate, reliable results in approximately 20 minutes from 'sample-to-result' to help medical professionals make earlier and better triage/treatment decisions. More information is available at www.bluejaydx.com.

Forward-Looking Statements:

This press release contains statements that the Company believes are "forward-looking statements" within the meaning of the Private Litigation Reform Act. Forward-looking statements may be identified by words such as "anticipates," "believes," "estimates," "expects," "intends," "may," "plans," "projects," "seeks," "should," "suggest," "will," and similar expressions. The Company has based these forward-looking statements on its current expectations and projections about future events, nevertheless, actual results or events could differ materially from the plans, intentions and expectations disclosed in, or implied by, the forward-looking statements the Company makes. These statements are only predictions and involve known and unknown risks, uncertainties, and other factors, including market and other conditions and those discussed under item 1A. "Risk Factors" in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, and in Part II, Item 1A, "Risk Factors" in its Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2026 and June 30, 2026. You should not place undue reliance on these forward-looking statements, as they are subject to risks and uncertainties, and actual results and performance in future periods may not occur or may be materially different from any future results or performance suggested by the forward-looking statements in this release. This press release speaks as of the date indicated above. The Company undertakes no obligation to update any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law. The Company expressly disclaims any obligation to update or revise any forward-looking statements found herein to reflect any future changes in the Company's expectations of results or any future change in events, except as required by law.

Investor Contact:

Neil Dey
Bluejay Diagnostics, Inc.
ir@bluejaydx.com
Website: www.bluejaydx.com

SOURCE: Bluejay Diagnostics

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