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Vitamin B12 injections are medically necessary when a patient has severe deficiency, neurological symptoms requiring rapid correction, or a condition that prevents adequate oral absorption
Even if administered separately, co-administration without formal pharmacokinetic and pharmacodynamic evaluation cannot be considered safe
Presented for research literature review only Nery IHAV et al
study involving HIV-infected children, the use of vitamin A supplementation prior to influenza vaccination muted the increase of HIV viral load post-immunization
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