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ImmuneRegen BioSciences Files 8-K that Highlights Enclosed Shareholder Letter Discussing Recent Achievements and Outlook   

SCOTTSDALE, Ariz., Aug 16, 2007 - IR BioSciences Holdings, Inc. (OTCBB: IRBO) today released a letter to shareholders from Chairman and CEO Michael K. Wilhelm. The purpose of the letter is to provide an update to its shareholders on its subsidiary ImmuneRegen BioSciences’ past year of progress in the infectious disease and disaster preparedness sectors. ImmuneRegen today has also filed a Form 8-K containing the shareholder letter with the Securities and Exchange Commission. The Form 8-K will be available on ImmuneRegen’s website at www.immuneregen.com. The text of the letter is contained below:

Dear Shareholder,

The previous year has been a noteworthy one for ImmuneRegen BioSciences. Our scientific and business activities have accelerated, and the company has recently announced several noteworthy achievements and events such as acquisition of study results, formation of collaborative and co-development relationships as well as presentations at conferences and to the FDA and NIH. The response by these agencies of the Department of Health and Human Services remains quite positive as we continue to deliver additional data in multiple areas of both scientific and product development interest and having potential commercial appeal.

Current research programs include microbiological infection such as anthrax bacillus, and influenza (including avian influenza vaccine adjuvancy), in addition to radiation exposure (to both lethal and sub-lethal/therapeutic doses). Results of our influenza studies indicate that Viprovex® lowers viral load 90-99% in nose and lungs of treated animals, as well as lowers the magnitude of the virus-induced decreases in body weight and temperature. These studies also indicate that Viprovex decreases the inflammatory reaction in the lungs of infected animals, even in the presence of Roche’s influenza treatment and preventative, Tamiflu®. The company is continuing Tamiflu/Viprovex studies and they are underway. Our radiation exposure studies, originally for biodefense applications and terrorist attacks have been extended to include potential cancer therapy applications. The radiation results have indicated recovery of circulating white blood cells, and potential stimulatory effects on stem cell proliferation and/or maturation. Wound healing is also a market in which we anticipate forthcoming success. Results from recently concluded studies indicate positive effects in the area and we expect our drug candidate to continue to demonstrate positive results as a potential growth factor. We also believe that our recently announced relationships with companies such as Uluru Inc. will expedite our efforts in wound healing.

In the opinion of management the current stock valuation does not reflect the newly acquired data and relationships. We continue to successfully develop business relationships with potential partners and advance our product development activities in multiple, sizeable markets. For example, the biodefense and pandemic influenza market has been estimated at a combined total of $6.1 billion with seasonal influenza opportunities, as a therapeutic or adjuvant to vaccination representing $2 billion total market revenues in 2006. Cancer therapies for mitigating side effects to toxic therapy and/or potentially playing a therapeutic role in the stem cell area of medical treatments has a combined commercial market worldwide estimated at $16.1 billion in revenue. Additionally, we hope to achieve continual successful results in the wound healing studies that we have currently partnered with Uluru, Inc. We are collectively working toward adding additional pharmaceutical company partnerships so we can develop effective wound healing treatments that can theoretically address a broad range of applications: diabetic ulcers, trauma, surgical wounds, day to day cuts and scrapes. For 2006, the global wound care market represented $7 billion in sales. A recent report by Global Industry Analysts, Inc. dated July 9, 2007 stated that the wound care products market is to reach $15.3 billion by 2010, driven by sealants, growth factors, and skin replacements. Also, the US market alone should be over $6 billion by 2010. We are very excited about this work and are pleased as well as honored to be working with our current partners in these areas. As our company continues to hit milestones, it is our belief that we will have more visibility to Wall Street, industry peers, potential partners and the scientific community.

The outside laboratories that have been conducting research for us have been performing excellent work and we appreciate the relationships that we have developed, maintain, and may expand as we seek new and experienced partners in our development efforts (most recently VaxGen and Uluru).

I am looking forward to announcing our next updates, results, conferences, etc. The relationships we are forging today based on our current data as well as anticipation of future data are very exciting and we hope to be able to discuss formalizing them over the next few months. Keep in touch with our updates by viewing our website www.immuneregen.com. We are available to answer your queries and hope that you will send an email to me at mwilhelm@immuneregen.com or to Dr. Siegel, Senior Director of Product Development and Regulatory Affairs hsiegel@immuneregen.com. We are happy to answer your corporate and scientific questions. Keep in mind that our responses can only reflect that information that is already publicly available.

Best regards,

Michael K. Wilhelm
Chief Executive Officer
ImmuneRegen BioSciences, Inc.
IR BioSciences Holdings, Inc.

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About ImmuneRegen BioSciences, Inc.

a wholly owned subsidiary of IR BioSciences Holdings, Inc., (OTC BB:IRBS.OB - News) is a development-stage biotechnology company focused on the research, development and licensing of Homspera® and its derivatives. Homspera is an adult stem cell active compound that in study results has been shown to regenerate and strengthen the immune system and enhance wound healing. Viprovex®, a derivative of Homspera, is being developed for potential use against infectious diseases as a stand-alone or combination therapy and as a vaccine adjuvant. To advance its mission, the Scottsdale, Arizona based company has forged numerous study partnerships with industry and academic leaders, including Celgene Cellular Therapeutics, HemoGenix, Lovelace Respiratory Research Institute and Virion Systems. For more information, please visit www.immuneregen.com.

Statements about ImmuneRegen's future expectations, including statements about the potential use and scientific results for ImmuneRegen's drug candidates, science and technology, and all other statements in this press release other than historical facts, are "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, and as that term is defined in the Private Securities Litigation Reform Act of 1995. ImmuneRegen intends that such forward-looking statements be subject to the safe harbors created thereby. These future events may not occur as and when expected, if at all, and, together with ImmuneRegen's business, are subject to various risks and uncertainties. ImmuneRegen's actual results could differ materially from expected results as a result of a number of factors, including the uncertainties inherent in research and development collaborations, pre-clinical and clinical trials and product development programs (including, but not limited to the fact that future results or research and development efforts may prove less encouraging than current results or cause side effects not observed in current pre-clinical trials), the evaluation of potential opportunities, the level of corporate expenditures and monies available for further studies, capital market conditions, and others set forth in ImmuneRegen's periodic report on Form 10-Q for the three months ended June 30, 2008 and on Form 10-KSB for the year ended December 31, 2007 as filed with the Securities and Exchange Commission. There are no guarantees that any of ImmuneRegen's proposed products will prove to be commercially successful. ImmuneRegen undertakes no duty to update forward-looking statements.

Contact:
Amendola Communications for ImmuneRegen
Jan Shulman, 480-664-8412 ext. 12
jshulman@ACmarketingPR.com

or


Jodi Amendola, 480-664-8412 ext 11
jamendola@ACmarketingPR.com

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