A cancer vaccine consisting of ALVAC, a highly attenuated poxvirus strain derived from the canarypox virus. ALVAC-B7-CEA expresses carcinoembryonic antigen (CEA), a protein that is overexpressed by many tumor cells, and B7.1 (also known as CD80), the natural ligand for the T-cell antigen CD28, to augment the host immune response. This agent has been shown to stimulate a host immune response against tumor cells that express CEA. (NCI04) [ ]