<PAGE>
Exhibit 23.1
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-3) and related Prospectus of Immunex Corporation
for the registration of its common stock and to the incorporation by reference
therein of our report dated January 21, 2000, except Note 13 as to which the
date is February 17, 2000, with respect to the consolidated financial
statements and schedule of Immunex Corporation included in its Annual Report
(Form 10-K) for the year ended December 31, 1999, filed with the Securities and
Exchange Commission.
Ernst & Young LLP
Seattle, Washington
August 8, 2000
