Consent of Independent Certified Public Accountants

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-3 No. 33-XXXXX) and related Prospectus of Aphton
Corporation for the registration of 150,000 shares of its common stock and to
the incorporation by reference therein of our report dated March 26, 2003, with
respect to the financial statements of Aphton Corporation included in its Annual
Report (Form 10-K) for the year ended December 31, 2002, filed with the
Securities and Exchange Commission.



                                             /s/ Ernst & Young LLP

Miami, Florida
April 11, 2003