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Navidea Biopharmaceuticals Announces Enrollment Of First Subject In Phase 2 Trial Of NAV4694 As An Aid In Diagnosing Alzheimer’s Disease

Information on the protocol and enrolling sites for this study (NAV4-01) can be found at: http://www.clinicaltrials.gov/ct2/show/NCT01680588?term=NAV4&rank=1

About NAV4694

NAV4694 is a Fluorine-18 labeled precision radiopharmaceutical candidate intended for use in Positron Emission Tomography (PET) imaging and evaluation of patients with signs or symptoms of cognitive impairment such as Alzheimer’s disease (AD). NAV4694 binds to β -amyloid deposits in the brain that can then be imaged in scans. Amyloid plaque pathology is standardly used in the diagnosis of AD so the ability of NAV4694 combined with amyloid plaque pathology may enable earlier identification of AD and improve monitoring of disease progression and interpretation of brain scan images. Navidea plans for a Phase 3 trial of NAV4694 to begin in early 2013.

About Alzheimer’s

Alzheimer’s disease (AD) is a progressive and fatal neurodegenerative disease which affects a person’s memory and ability to learn, reason, communicate and carry out daily activities. Increasing age is the greatest risk factor for AD and there is no prevention or cure. The World Health Organization estimates that Alzheimer’s disease affects over 24,000,000 people worldwide. Currently in the U.S. alone, there are over 5 million Alzheimer’s patients with estimates that by 2050, as many as 16 million Americans could have the disease according to the Alzheimer’s Association . Among the brain changes believed to contribute to the development of Alzheimer’s are the accumulation of the protein β -amyloid outside nerve cells (neurons) in the brain and the accumulation of the protein tau inside neurons. Approximately 75 to 100 experimental therapies aimed at diagnosing, slowing or stopping the progression of Alzheimer’s are now in human clinical trials.

About Navidea Biopharmaceuticals, Inc.

Navidea Biopharmaceuticals, Inc. (NYSE MKT: NAVB) is a biopharmaceutical company focused on the development and commercialization of precision diagnostics and radiopharmaceutical agents. Navidea is actively developing four radiopharmaceutical agent platforms – Lymphoseek ®, NAV4694, CFT and RIGScan TM – to help identify the sites and pathways of undetected disease and enable better diagnostic accuracy, clinical decision-making and, ultimately, patient care. Navidea’s strategy is to deliver superior growth and shareholder return by bringing to market novel radiopharmaceutical agents and advancing the Company’s pipeline through selective acquisitions, global partnering and commercialization efforts. For more information, please visit www.navidea.com.

The Private Securities Litigation Reform Act of 1995 (the Act) provides a safe harbor for forward-looking statements made by or on behalf of the Company. Statements in this news release, which relate to other than strictly historical facts, such as statements about the Company’s plans and strategies, expectations for future financial performance, new and existing products and technologies, anticipated clinical and regulatory pathways, and markets for the Company’s products are forward-looking statements within the meaning of the Act. The words “believe,” “expect,” “anticipate,” “estimate,” “project,” and similar expressions identify forward-looking statements that speak only as of the date hereof. Investors are cautioned that such statements involve risks and uncertainties that could cause actual results to differ materially from historical or anticipated results due to many factors, including, but not limited to, the Company’s continuing operating losses, uncertainty of market acceptance of its products, reliance on third-party manufacturers, accumulated deficit, future capital needs, uncertainty of capital funding, dependence on limited product line and distribution channels, competition, limited marketing and manufacturing experience, risks of development of new products, regulatory risks and other risks detailed in the Company’s most recent Annual Report on Form 10-K and other Securities and Exchange Commission filings. The Company undertakes no obligation to publicly update or revise any forward-looking statements.



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