I find it amazing that the WTBTS says that you should refuse blood, even if it could save your life.
Look at the apostle Paul. He knew the injunctions of Acts 15 - yet by his own admission in his letters to the Corinthians admitted that he bought meat sacrificed to idols and ate it. So would he have refused this meat if he were about to die of hunger?
Sounds to me that he didn't take this injunction with more than a pinch of salt as he must have known when he accepted invites from unbelievers he would prolly get strangled chicken, meat from idols and doormice boiled in blood and honey.
HB