Exhibit 23.3 ------------ CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Nabi of our report dated March 26, 1999 relating to the financial statements and financial statement schedules which appears in Nabi's Annual Report on Form 10-K for the year ended December 31, 1999. /s/ PricewaterhouseCoopers LLP PRICEWATERHOUSECOOPERS LLP Miami, Florida June 7, 2000