Nabi Biopharmaceuticals Announced that All Four of the Proposals Put Forth to Stockholders Have Been Approved by Shareholders

BOCA RATON, Fla., May 18 /PRNewswire-FirstCall/ -- Nabi Biopharmaceuticals today announced that all four of the proposals put forth to stockholders by the company at its Annual Meeting of Stockholders have been approved. Approximately 92% of total shares were voted by proxy or at the annual meeting, held today in Boca Raton, Florida.

Proposals approved by stockholders: -- Elected the company’s nine Board of Director nominees for terms through the 2008 Annual Meeting of Stockholders; -- Approved the amendment and restatement of the 2000 Equity Incentive Plan into the 2007 Omnibus Equity and Incentive Plan; -- Approved the amendment and restatement of the 2000 Employee Stock Purchase Plan; and -- Ratified the appointment of Ernst & Young LLP as the company’s independent registered public accounting firm for the current fiscal year.

Nabi also announced today that it has completed the sale of its Aloprim(TM) (allopurinol sodium) for Injection product. The company received $1.3 million at closing and will receive an additional $1.4 million at the end of 2007 and $1.0 million at the end of 2008.

About Nabi Biopharmaceuticals

Nabi Biopharmaceuticals leverages its experience and knowledge in powering the immune system to develop and market products that fight serious medical conditions. The company has one product on the market today: Nabi-HB(R) [Hepatitis B Immune Globulin (Human)]. Nabi Biopharmaceuticals is focused on developing products that address unmet medical needs and offer commercial opportunities in our core business areas: Hepatitis and transplant, Gram- positive bacterial infections and nicotine addiction. The company recently announced that it intends to form two strategic business units: Nabi Biologics and Nabi Pharmaceuticals. Nabi Biologics will have responsibility for the company’s protein and immunological products and development pipeline, including Nabi-HB. Nabi Pharmaceuticals will have responsibility for the NicVAX(R) (Nicotine Conjugate Vaccine) and StaphVAX(R)-Pentavalent (Staphylococcal Polysaccharide Conjugate and Toxoid Vaccine) development programs, as well as for the continuing milestone-related clinical development obligations following the sale of PhosLo(R) (calcium acetate). For a complete list of pipeline products, please go to: http://www.nabi.com/pipeline/index.php. The company is headquartered in Boca Raton, Florida. For additional information about Nabi Biopharmaceuticals, please visit our Web site: http://www.nabi.com.

Forward-Looking Statements

Statements in this release that are not strictly historical are forward- looking statements and include statements about reorganization of our current business into two new business units, clinical trials and studies, licensure applications, and alliances and partnerships. You can identify these forward- looking statements because they involve our expectations, beliefs, projections, anticipations or other characterizations of future events or circumstances. These forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties that may cause actual results to differ materially from those in the forward-looking statements as a result of any number of factors. These factors include, but are not limited to, risks relating to our ability to: successfully partner with third parties to fund, develop, manufacture and/or distribute our existing and pipeline products, including NicVAX and our Gram-positive infections products; obtain successful clinical trial results; generate sufficient cash flow from sales of products or from milestone or royalty payments to fund our development and commercialization activities; attract and maintain the human and financial resources to commercialize current products and bring to market products in development; depend upon third parties to manufacture or fill our products; obtain regulatory approval for our products in the U.S. or other markets, including approval of Nabi-HB Intravenous; realize sales from Nabi-HB due to patient treatment protocols, the number of liver transplants performed in HBV- positive patients and competitive products; achieve market acceptance of our products; expand our sales and marketing capabilities or enter into and maintain arrangements with third parties to market and sell our products; effectively and/or profitability use, or utilize the full capacity of, our vaccine manufacturing facility; manufacture NicVAX or other products in our own vaccine manufacturing facility; comply with reporting and payment obligations under government rebate and pricing programs; raise additional capital on acceptable terms, or at all; and re-pay our outstanding convertible senior notes when due. Many of these factors are more fully discussed, as are other factors, in the company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2006 and our Quarterly Report for the quarter ended March 31, 2007 on Form 10-Q with the Securities and Exchange Commission.

Nabi Biopharmaceuticals

CONTACT: Investor Relations of Nabi Biopharmaceuticals, +1-561-989-5800