Hot answers tagged yom-tov
In brief, no, this is not permissible. Two issues: 1 - See here regarding the problem of bleeding and causing a wound on Shabbat. Some say it is a prohibition of shochet - slaughtering. Others say this is a prohibition of dosh b/c blood is "extracted" from blood vessels and capillaries. The article does specifically mention giving a blood test on Shabbat, ...
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