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Description
For purposes of B12 injections, It is manufactured in a laboratory and used to treat or alleviate anemia caused by B12 vitamin deficiency

Eckert et al., 2001

Working with a partial setup leads to contamination and mistakes

Experts cautioned that more research is needed before broad conclusions can be drawn, but the results do provide some evidence that robust immunity is generated after one dose and that the second dose could be delayed beyond the three weeks prescribed by Pfizer in order to ease distribution and supply constraints