| http://www.w3.org/ns/prov#value | - The in vivo release rate and extent of release of the immunogenic agent from the solid implant matrix may be effectively controlled and optimized, for example, by varying the matrix formulation according to the desired duration or time interval for maintaining the solid matrix within the implant site, and by varying the type and amount of adjuvants and additives, such as plasticizing agents, and b
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