Press Release

PORTLAND, Ore.--(BUSINESS WIRE)--Aug. 1, 2007--AVI BioPharma Inc. (Nasdaq:AVII) today announced that the company will hold a conference call to discuss its 2007 second quarter financial results on Wednesday, August 8, 2007, at 11:00 a.m. Eastern time (8:00 a.m. Pacific time).

Individuals interested in listening to the live conference call may do so by dialing (888) 803-8271 toll free within the United States and Canada, or (706) 634-2467 for international callers. A telephone replay of the conference call will be available for 48 hours, beginning August 8 within two hours after the conclusion of the call, by dialing (800) 642-1687 domestically, or (706) 645-9291 internationally, and entering reservation number 7205349.

The conference call can be heard live via audio webcast at the company's Web site: www.avibio.com. A webcast replay will be available for 14 days.

About AVI BioPharma

AVI BioPharma develops therapeutic products for the treatment of life-threatening diseases using third-generation NEUGENE(R) antisense drugs and ESPRIT exon skipping technology. AVI's lead NEUGENE antisense compound is designed to target cell proliferation disorders, including cardiovascular restenosis. In addition to targeting specific genes in the body, AVI's antiviral program uses NEUGENE antisense compounds to combat disease by targeting single-stranded RNA viruses, including West Nile virus, hepatitis C virus, dengue virus, Ebola virus and influenza A virus. AVI's NEUGENE-based ESPRIT technology will initially be applied to potential treatments for Duchenne muscular dystrophy. More information about AVI is available on the company's Web site at http://www.avibio.com.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: The statements that are not historical facts contained in this release are forward-looking statements that involve risks and uncertainties, including, but not limited to, the results of research and development efforts, the results of preclinical and clinical testing, the effect of regulation by the FDA and other agencies, the impact of competitive products, product development, commercialization and technological difficulties, and other risks detailed in the company's Securities and Exchange Commission filings.

    CONTACT: AVI BioPharma, Inc.
             Michael Hubbard, 503-227-0554
             hubbard@avibio.com
             or
             Investor Contacts:
             Lippert/Heilshorn & Associates, Inc.
             Jody Cain
             jcain@lhai.com
             Brandi Floberg
             bfloberg@lhai.com
             310-691-7100
             or
             Press Contact:
             Waggener Edstrom Worldwide
             Bioscience and Healthcare Practice
             Jenny Moede, 503-443-7000
             jmoede@waggeneredstrom.com

    SOURCE: AVI BioPharma Inc.