If you dad has worked with the HLC or done his research on blood, you can ask him, "if its ok to take a few drops of blood, then why not a whole pint? or pints? or a gallon, for that matter!"
It is considered a conscious matter to take the treatment called a "blood patch" (just ask the HLC elder) which is when they remove your blood, work on it and give it back to you. This "treatment" is given to women who suffer migraines when they are getting an epidural. I had assumed we could not do this treatment when I found out about it during Lamaze. But during the seminar I attended with our elders which was conducted by an elder and employee of a medical center, it was told to us that this was a conscious matter and considered a "medical treatment" and not considered "taking blood."
Ask your dad if taking pencillin for a cold is considered "eating penicillan"!!!