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gwmccull t1_j4z7shg wrote

Reply to comment by MercurioLeCher in Is there any difference in efficacy when a vaccine is administered somewhere other than the upper arm (e.g. on the foot)? by MercurioLeCher

BCG is not given intramuscularly, it is given intradermaly. From what I remember, an intradermal injection is given by inserting the needle into the first few layers of skin and then the injection is made in a pocket within the skin. Sometimes I think they will even insert the needle and then lift it to help form the pocket

If BCG is given subcutaneously (below the skin) then it can be dangerous to the patient

So it makes sense then that BCG could be given on the foot since it’s within the skin and not the muscle

Source: https://en.m.wikipedia.org/wiki/BCG_vaccine

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