Microbio (Shanghai) and Oneness co-developed broad-spectrum siRNA (SNS812) to treat SARS-CoV-2 infection, was greenlighted by FDA to proceed with a phase I study.

SEQ_NO	1	Date of announcement	2022/08/17	Time of announcement	17:08:22
Subject	Microbio (Shanghai) and Oneness co-developed broad-spectrum siRNA (SNS812) to treat SARS-CoV-2 infection,was greenlighted by FDA to proceed with a phase I study.
Date of events	2022/08/17	To which item it meets	paragraph 14
Statement	1.Date of occurrence of the event:2022/09/23 2.Company name:Microbio (Shanghai) 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):subsidiary 4.Reciprocal shareholding ratios:NA 5.Cause of occurrence: (1)New drug name or code: SNS812 (2)Purpose: A.Treatment for COVID-19 infection B. Information Website:has not submitted (3)Planned development stages：Phase I, Phase II, Phase III, NDA (4)Current development stage: A.File application/approved/disapproved/Each of clinical trials (include interim analysis):SNS812, a broad-spectrum siRNA for treatment of SARS-COV-2 infection has been greenlighted by the US FDA to proceed with the phase I study. B.Once disapproved by competent authority or each of clinical trials (include interim analysis) results less than statistically significant sense, the risks and the associated measures the Company may occur: Not applicable C.After obtaining official approval or the results (include interim analysis) of statistically significant sense, the future strategy:Not applicable D.Accumulated investment expenditure incurred:Considering the future marketing strategy and to protect the rights and interests of the company and investors, it will not be disclosed publicly. (5)Upcoming development plan: Phase I, Phase II, Phase III A.Scheduled completion date: The actual time schedule will depend on the progress of the trial and the review of the regulatory agency. B.Estimate responsibilities: SNS812 is a broad-spectrum siRNA for treatment of SARS-CoV-2 infection that co-developed by Microbio (Shanghai) and Oneness Biotech Co., Ltd.. (6)Market: Based on the data published on September 22, 2022, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected more than 613 million people worldwide and caused more than 6 million deaths. With the occurrence of vaccine breakthrough and repeated COVID-19 infections caused by new variants, it is anticipated that the future new variants will lead to periodic global epidemics. The coexistence of the SARS-CoV-2 and human beings seems inevitable and the broad-spectrum therapeutics to treat SARS-CoV-2 will be able to address the large medical needs. 6.Countermeasures:None 7.Any other matters that need to be specified: (1)SNS812 is a broad-spectrum siRNA therapeutic to treat SARS-CoV-2 variants covering 99.8% of current SARS-CoV-2 variants and shown a picomolar inhibition of dominant ones, including Alpha, Delta, Gamma, Epsilon and Omicron. Moreover, the K18-hACE2-transgenic mice studies demonstrated that SNS812 could completely inhibit the replication of infectious virions in lungs by prophylactic treatment and decrease 96.2% of virions by post-treatment. It is also noted that virus-associated extensive pulmonary alveolar damage, vascular thrombi, and immune cell infiltrations have been significantly reduced by SNS812 treatment. (2)The COVID-19 pandemic has continued to evolve. In addition to verifying SNS812 in treatment and prevention of SARS-CoV-2 infection, SNS812 is positioned as a treatment solution to the periodic outbreak of life-threatening COVID-19. (3)According to the Guidelines by Taipei Exchange on the Material Information Announced by Listed and OTC Companies, new drug development companies shall make public announcement when filing application for clinical trials to domestic or overseas regulatory authorities, receiving approval or disapproval, obtaining the statistical date of endpoints in each clinical trial (including interim analysis), or receiving approval or disapproval on drug license application. (4)It takes considerable time and expenses to develop a new drug of which success can’t be guaranteed. Investors shall bear such investment risk that warrants careful assessment before making investment decisions.