| CPC A61K 39/39 (2013.01) [A61K 39/25 (2013.01); A61P 31/22 (2018.01); A61P 37/04 (2018.01); A61K 2039/55511 (2013.01); A61K 2039/55516 (2013.01)] | 8 Claims | 
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               1. A vaccination method for treatment or prevention of infection in a mammal, said method comprising administering a vaccine composition intramuscularly to a mammal, wherein said vaccine composition comprises an antigen and an adjuvant, the adjuvant comprising zinc risedronate micro/nanoparticles, wherein the zinc risedronate micro/nanoparticles consist of zinc and risedronic acid and, optionally phosphate, and wherein the zinc risedronate micro/nanoparticles have a molar concentration ratio of zinc: risedronic acid of 1-8:1. 
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