The command to abstain from blood was not merely a health guideline or confined to a specific ritual, but a divine prohibition that followed God's moral PRINCIPLE on blood.
Throughout human history, God consistently made it clear for humans to abstain from blood. God began with commanding Noah and his family to abstain from blood. (Gen. 9:4) He repeated this through the Mosaic law (Le 7:26, 27; 17:10, 11, 13, 14) and He continued to remind us through the pages of the New Testament. (Acts 15:28, 29; Acts 15:19, 20)
"This law [of abstaining from blood] was ancienter than the days of Moses, being given to Noah and his sons, long before the days of Abraham: and therefore when the Apostles and Elders in the Council at Jerusalem declared that the Gentiles were not obliged to be circumcised and keep the law of Moses, they excepted this law of abstaining from blood, and things strangled, as being an earlier law of God, imposed not on the sons of Abraham only, but on all nations, while they lived together in Shinar under the dominion of Noah: and of the same kind is the law of abstaining from meats offered to Idols or false Gods, and from fornication." -The Chronology of Ancient Kingdoms Amended, by Sir Isaac Newton (Dublin, 1728, p. 184)
"It ought to be observed, that this prohibition of eating blood, given to Noah and all his posterity, and repeated to the Israelites, in a most solemn manner, under the Mosaic dispensation, has never been revoked, but, on the contrary, has been confirmed under the New Testament, Acts xv.; and thereby made of perpetual obligation."—Joseph Benson; Benson’s Notes, 1839, Vol. I, p. 43.
For more see:
Questions About Blood
Is the Eating or Drinking of Blood Fundamentally Different From Accepting a Blood Transfusion?