Bid rent theory in the central business district (CBD) [edit]. Land users, whether they be retail, office, or residential, all compete for the most accessible land within the CBD. The amount they are willing to pay is called bid rent.
Recombinant or purified protein vaccines consist of protein antigens that have either been produced in a heterologous expression system (e.g., bacteria or yeast) or purified from large amounts of the pathogenic organism.
A vaccine is a preparation of a weakened or dead pathogen that stimulates an immune response that can prevent infec-. tion or create resistance to an infection. Prerequisite(s) Applicable Harvard Pilgrim referral, notification and authorization policies and procedures apply.