EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (File Nos. 333-49852 and 333-49856) of Dyax Corp. of our report dated February 15, 2001 relating to the financial statements and financial statement schedule, which appear in this Form 10-K. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Boston, Massachusetts March 30, 2001