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That verse in Leviticus says don't eat blood. It doesn't say not to inject it.


Human blood is not included in the prohibition (Shulchan Arukh YD 66:10). There is a concern when consuming any permitted blood that no one think you are consuming forbidden blood. A classic solution to this is including fish scales in a cup of fish blood (ibid. :9). It seems to me that a transfusion bag serves this purpose sufficiently. Even were one to ...


I don't have much to add to the Rabbi's excellent answer. However, I want to point out that, with the blood, there may be a distinction between using a disposable and a non-disposable cloth. According to some Poskim, although soiling an object is not a Biblical violation--since the melachah of tzovaya refers only to improving or beautifying something through ...

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