CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in the Registration
Statements on Forms S-8, (File Nos. 333-52796, 333-34780, 33-80036, 33-80048
and 333-62017) and the Registration Statements on Forms S-3 (File Nos.
333-43204, 333-52736, 33-64021, 333-08607, 333-56755, 333-64761 and 333-89341),
of AVANT Immunotherapeutics, Inc. (f/k/a TCell Sciences, Inc.) of our report
dated February 7, 2002 relating to the financial statements of AVANT
Immunotherapeutics, Inc. (f/k/a TCell Sciences, Inc) which appears in the
Annual Report on Form 10-K for the year ended December 31, 2001.

PricewaterhouseCoopers LLP

Boston, Massachusetts
March 26, 2002