How have mainstream Christian denominations interpreted the Acts command to abstain from blood?

Acts 15:28 and 29 tells us that basically all of the old law covenant is no longer to be observed except: >Acts 15:28 KJV For it seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things; Are Christians under obligation to avoid any or all of those 4 things today? >Acts 15:29 KJV That ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well. Most religions are in agreement that sexual immorality (fornication) should be avoided. Of particular interest is what it meant in ancient times to abstain from blood and what it means now in modern times to abstain from blood. As far as I know only the Jehovahs Witnesses refuse blood transfusing for religious reasons. I would like **an overview of mainstream Christian groups' interpretation of this scripture**, in light of the vastly different conditions we have now with most of us never being involved in the slaughter of the animals we consume, in addition to the many medical therapies that involve blood and fractions thereof. **Edit** Answers should specifically state what various denominations teach regarding abstinence from blood. What must adherents of denomination X do or not do to demonstrate they are abstaining from blood?