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The durability of vaccine protection is another key area that requires a better understanding of the fundamentals of immune memory, a key question being how can we limit the acute contraction of the adaptive immune response after prophylactic vaccination and limit attrition of long-term memory , in particular for nAb titers in the blood?

[1] [13] However, serum B12 has limitationslevels between 148258 pmol/L represent a 'grey area' where deficiency may still be present, particularly if clinical features are suggestive

What Is Vitamin B12, and What Are Its Normal Levels

Li D, Martinez DR, Schfer A, Chen H, Barr M, Sutherland LL, et al

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