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Anaphylaxis is a severe reaction to a trigger, such as an allergy, and is potentially life threatening
Vitamin B12 is needed to form red blood cells and DNA
For purposes of B12 injections, It is manufactured in a laboratory and used to treat or alleviate anemia caused by B12 vitamin deficiency
Dispose of residual solutions according to institutional chemical hygiene rules
Serious reactions to vitamin B12 are very rare, and most people will never experience them
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