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This study has significant limitations
It depends on your body and how low your B12 levels were
Evidence suggests that robust memory responses develop after reinfection of viruses and bacteria, whereas the hosts immune system appears to have only partial resistance to parasitic infection ( Leishmania ( Due to differential parasite size, antigen composition, and life cycles, host immune responses triggered by different types of parasites present specificity to some extent yet share many similarities
& Malla, A
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