Vaccines may be monovalent (also called univalent) or multivalent (also called polyvalent). A polyvalent vaccine is designed to immunize against two or more strains of the same microorganism, or against two or more microorganisms. Polyvalent vaccines will probably be required due to tumor cell heterogeneity, heterogeneity of the human immune response and the correlation between overall antibody titer against tumor cells and antibody effector mechanisms. Creative Biolabs is a world leader in the field of cancer vaccine development. With our extensive experience and advanced platform, we are therefore confident in offering the best development services for polyvalent cancer vaccines. We guarantee the finest results for our customers all over the world.