RECITALSStockholder Voting Agreement • November 20th, 1998 • Peptide Therapeutics Group PLC • Biological products, (no disgnostic substances) • Massachusetts
ORAVAX, INC.Stock Purchase Agreement • November 20th, 1998 • Peptide Therapeutics Group PLC • Biological products, (no disgnostic substances) • Delaware
EXHIBIT 4 AGREEMENT AS TO JOINT FILING OF SCHEDULE 13D Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13D, and agrees that this Schedule 13D is filed on its behalf. Date: November 20, 1998 PEPTIDE THERAPEUTICS...Peptide Therapeutics Group PLC • November 20th, 1998 • Biological products, (no disgnostic substances)
Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13D, and agrees that this Schedule 13D is filed on its behalf.
