Tend to be more difficult and expensive to store and to | Esma SB
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Tend to be more difficult and expensive to store and toTend to be more difficult and expensive to store and to distribute, since viability must be maintained, often requiring formulation approaches [7] for stabilization . On the other hand, killed/inactivated vaccines have a number of disadvantages. The major challenge is that since cells are never infected with the live microbe, these vacci