New answers tagged blood
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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