The dubs that I know do not want any blood products at all. They equate them with other diseases and just dont want to take any. Their own life in this system is not so important.
But they are mainly "old school" . I have not spoken with younger ones..Did I not read when the poor girl from Telford (who had given birth to twins) was dying, the HLC tried to get the doctors to use fractions to try and save her?