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    BioVaxys Files Patent Application for Novel COVID-19 Diagnostic for T-Cell Immunity

    Published on November 2, 2020

    Vancouver, BC : BioVaxys Technology Corp. (CSE: BIOV) (“BioVaxys” or “the Company”), a world leader in haptenized protein vaccine research and development, announced today that it has filed a Provisional Patent Application with the U.S. Patent and Trademark Office entitled METHOD AND KIT FOR DETECTION OF CELL MEDIATED IMMUNE RESPONSE related to the potential development of a diagnostic for evaluating the presence or absence of a T-cell immune response to SARS-CoV-2, the virus that causes COVID-19.

    The BioVaxys method is based on measuring an immune response in a human showing no signs or symptoms of an active SARS-CoV-2 infection by administering a skin test of a subunit of the SARS-CoV-2 S-protein. Using Delayed Type Hypersensitivity[1] (“DTH”), a method which is known to demonstrate prior exposure and T cell immunity to tuberculosis[2], the immune system causes an inflammatory response that develops 24 to 72 hours after exposure. This type of immune response involves mainly T-cells rather than antibodies, which are made by B-cells.

    If ultimately successful, the diagnostic is intended to provide a low-cost, easy-to-administer, and accurate way to test for the presence of T-cells against SARS-CoV-2. Currently, the available methods of measuring T-cell immunity require a blood draw from the test subject followed by the time-consuming and expensive analysis of the blood sample at specialized laboratories. BioVaxys’ diagnostic includes a way to digitally measure T-cell presence via a smartphone (through the magnitude of the skin response which is a hallmark of DTH) so results can be sent immediately to healthcare providers. At this time, future studies and experiments are required to demonstrate that DTH from protein skin prick correlates to T-cell immunity in the blood against SARS-CoV-2. Now that the provisional patent application has been filed, BioVaxys intends to begin its studies, leveraging the planned work in Q1 2021 related to the manufacturing and clinical development of BVX-0320, BioVaxys’s preclinical vaccine candidate for SARS-CoV-2, as it is anticipated that BioVaxys will initially investigate the use of the same GMP-compliant protein for the DTH diagnostic that is used in the manufacturing of BVX-0320.

    David Berd, M.D., Chief Medical Officer at BioVaxys, who initially studied the potential use of DTH as a surrogate marker of T cell immunity in the context of clinical investigation of therapeutic autologous haptenized cancer vaccines[3], stated, “The availability of a low-cost and simple diagnostic for T-cell immunity would represent a critical tool for public health authorities to identify safe and at-risk populations and may contribute to worldwide efforts to combat COVID-19. BioVaxys believes that its novel T-cell diagnostic also provides an effective and low-cost tool to evaluate the effectiveness of any SARS-CoV-2 vaccine candidate in stimulating T cell immunity.”[3]

    Recent peer-reviewed studies, including one in Nature[4] and Cell[5], have highlighted the potential importance of T-cell, in addition to antibodies, when it comes to evaluating long-term immunity in patients who have recovered from COVID-19. While further evaluation is necessary, exploring this part of the immune system’s response to prevent future infection will be necessary in the global fight against this disease.

    BioVaxys’ CEO, James Passin stated, “We are thrilled to further develop and move our novel diagnostic for SARS-CoV-2 T-cell immunity towards commercialization. The mass availability of our low cost and easy-to-administer T-cell immunity diagnostic could help to complement antibody testing and various public health risk mitigation strategies.”

    A provisional patent application offers a patent applicant an option of filing without including a formal patent claim. In BioVaxys’s case, however, numerous patent claims have been included in the Provisional Application. The aim of a provisional patent application is to establish an early effective filing date, in addition to allowing the patent applicant to ascribe the phrase “patent pending” to any commercial products, methods, or services contemplated by the subject matter claimed. BioVaxys also plans to pursue an international Patent Cooperation Treaty (PCT) application, from which national stage patent applications can be submitted in both industrial jurisdictions and developing countries around the world.

    Additional Information:
    – BioVaxys’ patent application is for a diagnostic tool to test for SARS-COV-2, and not for a therapeutic treatment of SARS-COV-2. In addition, BioVaxys intends to seek future clearance from the U.S. Food & Drug Administration after sufficient clinical tests can be evaluated.
    – BioVaxys makes no express or implied claims that it has developed a vaccine to treat COVID-19 (or SARS-2 Coronavirus) at this time.

    David Berd, M.D. the Chief Medical Officer of BioVaxys, has reviewed and approved the scientific disclosure contained in this press release. Dr. Berd is a medical oncologist with a lifelong record of clinical research in medical oncology and cancer immunotherapy. Dr. Berd received his BS from Pennsylvania State University and his MD from Jefferson Medical College of Thomas Jefferson University.

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