looking at the questions to go over for the blood video, it looks like and i have heard in the past how the WTS expounds about the medical positives of not taking blood, and rails against blood for all the problems, diseases, and the fact that it does not always work........... the real question IS....... why do they even waste time on that if the issue is supposed to be a BIBLICAL/SCRIPTURAL RESTRICTION.?
even if taking blood was the best thing in the world for you , the WTS stance is that the bible and jehovah forbid it, end of story. there is really no need to try to convince people who want to supposedly follow jehovah's command to abstain from blood. according to the WTS jehovah says no, so the answer is NO.
do they just try to use medical "evidence" to persuade JW's even more to not take blood, or scare them with medical "what if's" to avoid blood? even though that evidence has NO bearing on what they think your view of blood should be, because according to them it is a SCRIPTURAL ISSUE, NOT A MEDICAL ONE!!!!!