Blood is sacred in God's eyes. God says that the soul, or life, is in the blood. So it is wrong to eat blood. It is also wrong to eat the meat of an animal that has not been properly bled. If an animal is strangled or dies in a trap, it should not be eaten. If it is speared or shot, it must be bled quickly if it is to be eaten.—Genesis 9:3, 4; Leviticus 17:13, 14; Acts 15:28, 29. Is it wrong to accept a blood transfusion? Remember, Jehovah requires that we abstain from blood. This means that we must not take into our bodies in any way at all other people's blood or even our own blood that has been stored. (Acts 21:25) So true Christians will not accept a blood transfusion. They will accept other kinds of medical treatment, such as transfusion of nonblood products. They want to live, but they will not try to save their life by breaking God's laws.—Matthew 16:25.

This is a good question. We show respect for blood by not eating it. In the Law that Jehovah gave the Israelites, he commanded: “If one of the Israelites . . . is hunting and catches a wild animal or a bird that may be eaten, he must pour its blood out and cover it with dust. . . . I said to the Israelites: ‘You must not eat the blood of any sort of flesh.’” (Leviticus 17:13, 14) God’s command not to eat animal blood, first given to Noah some 800 years earlier, was still in force. Jehovah’s view was clear: His servants could eat animal meat but not the blood. They were to pour the blood on the ground​—in effect, returning the creature’s life to God. A similar command rests upon Christians. The apostles and other men taking the lead among Jesus’ followers in the first century met together to decide what commands had to be obeyed by all in the Christian congregation. They came to this conclusion: “The holy spirit and we ourselves have favored adding no further burden to you except these necessary things: to keep abstaining from things sacrificed to idols, from blood, from what is strangled [“what is killed without draining its blood,” footnote], and from sexual immorality.” (Acts 15:28, 29; 21:25) So we must ‘keep abstaining from blood.’ In God’s eyes, our doing that is as important as our avoiding idolatry and sexual immorality. Does the command to abstain from blood include blood transfusions? Yes. To illustrate: Suppose a doctor were to tell you to abstain from alcoholic beverages. Would that simply mean that you should not drink alcohol but that you could have it injected into your veins? Of course not! Likewise, abstaining from blood means not taking it into our bodies at all. So the command to abstain from blood means that we would not allow anyone to transfuse blood into our veins. What if a Christian is badly injured or is in need of major surgery? Suppose doctors say that he must have a blood transfusion or he will die. Of course, the Christian would not want to die. In an effort to preserve God’s precious gift of life, he would accept other kinds of treatment that do not involve the misuse of blood. Hence, he would seek such medical attention if that is available and would accept a variety of alternatives to blood. For more information on this subject please visit jworg.

I don't think the misuse of blood is sacred to Yahweh, more sacrilege.

The Bible tells us don't eat blood. Now does it make any difference if you put the blood in your mouth or suck it through your nose or give yourself a blood enema or stick a needle in your arm and inject the blood no it does not it's still going into your body. However Jesus Christ showed that when a person is in danger of death or needs healing that on a Sabbath day you break the Sabbath and help the person. And then Jesus Christ came and said he created the law for you and not you for the law! Then Jesus Christ goes on to tell you I can forgive any manner of sin except the blasphemy against the holy Spirit so when there is a person in danger of death due to a lack of blood make sure he gets the blood and stays alive. And then you ask Jesus Christ for forgiveness because the Bible does say do not eat blood acknowledge your sin ask forgiveness for it that's the end of the matter.

The MISuse of blood is not sacred to God.